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Finding the Fourth Proportional to 99,415.20, 148,928.40 and 59,854.80

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Solution

The fourth proportional to 99,415.20, 148,928.40 and 59,854.80 is: 89,665.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,415.20 : 148,928.40 = 59,854.80 : x
  2. Step 2: Convert to fraction form
    99,415.20/148,928.40 = 59,854.80/x
  3. Step 3: Cross multiply
    99,415.20x = 148,928.40 × 59,854.80
  4. Step 4: Simplify right side
    99,415.20x = 8,914,079,596.32
  5. Step 5: Solve for x
    x = 8,914,079,596.32/99,415.20
  6. Step 6: Final answer
    x = 89,665.16

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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.