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Finding the Fourth Proportional to 128,045.70, 192,068.55 and 61,615.58

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Solution

The fourth proportional to 128,045.70, 192,068.55 and 61,615.58 is: 92,423.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,045.70 : 192,068.55 = 61,615.58 : x
  2. Step 2: Convert to fraction form
    128,045.70/192,068.55 = 61,615.58/x
  3. Step 3: Cross multiply
    128,045.70x = 192,068.55 × 61,615.58
  4. Step 4: Simplify right side
    128,045.70x = 11,834,414,147.67
  5. Step 5: Solve for x
    x = 11,834,414,147.67/128,045.70
  6. Step 6: Final answer
    x = 92,423.36

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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.