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Finding the Fourth Proportional to 99,068.81, 148,625.87 and 42,918.26

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Solution

The fourth proportional to 99,068.81, 148,625.87 and 42,918.26 is: 64,387.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,068.81 : 148,625.87 = 42,918.26 : x
  2. Step 2: Convert to fraction form
    99,068.81/148,625.87 = 42,918.26/x
  3. Step 3: Cross multiply
    99,068.81x = 148,625.87 × 42,918.26
  4. Step 4: Simplify right side
    99,068.81x = 6,378,762,773.67
  5. Step 5: Solve for x
    x = 6,378,762,773.67/99,068.81
  6. Step 6: Final answer
    x = 64,387.20

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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.