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Finding the Fourth Proportional to 123,457.67, 170,362.74 and 72,472.47

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Solution

The fourth proportional to 123,457.67, 170,362.74 and 72,472.47 is: 100,006.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,457.67 : 170,362.74 = 72,472.47 : x
  2. Step 2: Convert to fraction form
    123,457.67/170,362.74 = 72,472.47/x
  3. Step 3: Cross multiply
    123,457.67x = 170,362.74 × 72,472.47
  4. Step 4: Simplify right side
    123,457.67x = 12,346,609,154.97
  5. Step 5: Solve for x
    x = 12,346,609,154.97/123,457.67
  6. Step 6: Final answer
    x = 100,006.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.