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Finding the Fourth Proportional to 462,085.70, 693,128.55 and 129,661.70

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Solution

The fourth proportional to 462,085.70, 693,128.55 and 129,661.70 is: 194,492.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    462,085.70 : 693,128.55 = 129,661.70 : x
  2. Step 2: Convert to fraction form
    462,085.70/693,128.55 = 129,661.70/x
  3. Step 3: Cross multiply
    462,085.70x = 693,128.55 × 129,661.70
  4. Step 4: Simplify right side
    462,085.70x = 89,872,226,111.54
  5. Step 5: Solve for x
    x = 89,872,226,111.54/462,085.70
  6. Step 6: Final answer
    x = 194,492.55

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Similar ratio
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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.