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Finding the Fourth Proportional to 99,810.80, 149,641.32 and 60,359.84

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Solution

The fourth proportional to 99,810.80, 149,641.32 and 60,359.84 is: 90,494.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,810.80 : 149,641.32 = 60,359.84 : x
  2. Step 2: Convert to fraction form
    99,810.80/149,641.32 = 60,359.84/x
  3. Step 3: Cross multiply
    99,810.80x = 149,641.32 × 60,359.84
  4. Step 4: Simplify right side
    99,810.80x = 9,032,326,132.59
  5. Step 5: Solve for x
    x = 9,032,326,132.59/99,810.80
  6. Step 6: Final answer
    x = 90,494.48

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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.