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Finding the Fourth Proportional to 99,871.70, 149,842.47 and 62,387.81

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Solution

The fourth proportional to 99,871.70, 149,842.47 and 62,387.81 is: 93,603.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,871.70 : 149,842.47 = 62,387.81 : x
  2. Step 2: Convert to fraction form
    99,871.70/149,842.47 = 62,387.81/x
  3. Step 3: Cross multiply
    99,871.70x = 149,842.47 × 62,387.81
  4. Step 4: Simplify right side
    99,871.70x = 9,348,343,548.29
  5. Step 5: Solve for x
    x = 9,348,343,548.29/99,871.70
  6. Step 6: Final answer
    x = 93,603.53

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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.