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Finding the Fourth Proportional to 101,151.92, 139,655.40 and 90,523.28

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Solution

The fourth proportional to 101,151.92, 139,655.40 and 90,523.28 is: 124,980.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,151.92 : 139,655.40 = 90,523.28 : x
  2. Step 2: Convert to fraction form
    101,151.92/139,655.40 = 90,523.28/x
  3. Step 3: Cross multiply
    101,151.92x = 139,655.40 × 90,523.28
  4. Step 4: Simplify right side
    101,151.92x = 12,642,064,877.71
  5. Step 5: Solve for x
    x = 12,642,064,877.71/101,151.92
  6. Step 6: Final answer
    x = 124,980.97

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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.