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Finding the Fourth Proportional to 100,884.74, 139,187.61 and 65,098.53

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Solution

The fourth proportional to 100,884.74, 139,187.61 and 65,098.53 is: 89,814.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,884.74 : 139,187.61 = 65,098.53 : x
  2. Step 2: Convert to fraction form
    100,884.74/139,187.61 = 65,098.53/x
  3. Step 3: Cross multiply
    100,884.74x = 139,187.61 × 65,098.53
  4. Step 4: Simplify right side
    100,884.74x = 9,060,908,805.21
  5. Step 5: Solve for x
    x = 9,060,908,805.21/100,884.74
  6. Step 6: Final answer
    x = 89,814.47

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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.