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Finding the Fourth Proportional to 88,903.40, 133,095.90 and 86,311.40

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Solution

The fourth proportional to 88,903.40, 133,095.90 and 86,311.40 is: 129,215.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,903.40 : 133,095.90 = 86,311.40 : x
  2. Step 2: Convert to fraction form
    88,903.40/133,095.90 = 86,311.40/x
  3. Step 3: Cross multiply
    88,903.40x = 133,095.90 × 86,311.40
  4. Step 4: Simplify right side
    88,903.40x = 11,487,693,463.26
  5. Step 5: Solve for x
    x = 11,487,693,463.26/88,903.40
  6. Step 6: Final answer
    x = 129,215.46

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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.