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Finding the Fourth Proportional to 128,045.40, 192,068.10 and 114,955.80

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Solution

The fourth proportional to 128,045.40, 192,068.10 and 114,955.80 is: 172,433.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,045.40 : 192,068.10 = 114,955.80 : x
  2. Step 2: Convert to fraction form
    128,045.40/192,068.10 = 114,955.80/x
  3. Step 3: Cross multiply
    128,045.40x = 192,068.10 × 114,955.80
  4. Step 4: Simplify right side
    128,045.40x = 22,079,342,089.98
  5. Step 5: Solve for x
    x = 22,079,342,089.98/128,045.40
  6. Step 6: Final answer
    x = 172,433.70

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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.