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Finding the Fourth Proportional to 99,176.40, 148,545.90 and 86,054.40

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Solution

The fourth proportional to 99,176.40, 148,545.90 and 86,054.40 is: 128,891.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,176.40 : 148,545.90 = 86,054.40 : x
  2. Step 2: Convert to fraction form
    99,176.40/148,545.90 = 86,054.40/x
  3. Step 3: Cross multiply
    99,176.40x = 148,545.90 × 86,054.40
  4. Step 4: Simplify right side
    99,176.40x = 12,783,028,296.96
  5. Step 5: Solve for x
    x = 12,783,028,296.96/99,176.40
  6. Step 6: Final answer
    x = 128,891.84

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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.