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Finding the Fourth Proportional to 128,045,603.85, 192,068,405.78 and 128,045,603.85

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Solution

The fourth proportional to 128,045,603.85, 192,068,405.78 and 128,045,603.85 is: 192,068,405.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,045,603.85 : 192,068,405.78 = 128,045,603.85 : x
  2. Step 2: Convert to fraction form
    128,045,603.85/192,068,405.78 = 128,045,603.85/x
  3. Step 3: Cross multiply
    128,045,603.85x = 192,068,405.78 × 128,045,603.85
  4. Step 4: Simplify right side
    128,045,603.85x = 24,593,514,997,966,700
  5. Step 5: Solve for x
    x = 24,593,514,997,966,700/128,045,603.85
  6. Step 6: Final answer
    x = 192,068,405.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.