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Finding the Fourth Proportional to 99,064.56, 148,465.20 and 85,854.96

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Solution

The fourth proportional to 99,064.56, 148,465.20 and 85,854.96 is: 128,668.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,064.56 : 148,465.20 = 85,854.96 : x
  2. Step 2: Convert to fraction form
    99,064.56/148,465.20 = 85,854.96/x
  3. Step 3: Cross multiply
    99,064.56x = 148,465.20 × 85,854.96
  4. Step 4: Simplify right side
    99,064.56x = 12,746,473,807.39
  5. Step 5: Solve for x
    x = 12,746,473,807.39/99,064.56
  6. Step 6: Final answer
    x = 128,668.35

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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.