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Finding the Fourth Proportional to 99,705.60, 149,356.80 and 62,150.40

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Solution

The fourth proportional to 99,705.60, 149,356.80 and 62,150.40 is: 93,099.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,705.60 : 149,356.80 = 62,150.40 : x
  2. Step 2: Convert to fraction form
    99,705.60/149,356.80 = 62,150.40/x
  3. Step 3: Cross multiply
    99,705.60x = 149,356.80 × 62,150.40
  4. Step 4: Simplify right side
    99,705.60x = 9,282,584,862.72
  5. Step 5: Solve for x
    x = 9,282,584,862.72/99,705.60
  6. Step 6: Final answer
    x = 93,099.93

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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.