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Finding the Fourth Proportional to 88,901.40, 133,092.90 and 86,309.40

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Solution

The fourth proportional to 88,901.40, 133,092.90 and 86,309.40 is: 129,212.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,901.40 : 133,092.90 = 86,309.40 : x
  2. Step 2: Convert to fraction form
    88,901.40/133,092.90 = 86,309.40/x
  3. Step 3: Cross multiply
    88,901.40x = 133,092.90 × 86,309.40
  4. Step 4: Simplify right side
    88,901.40x = 11,487,168,343.26
  5. Step 5: Solve for x
    x = 11,487,168,343.26/88,901.40
  6. Step 6: Final answer
    x = 129,212.46

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1.5x scale

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.