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Finding the Fourth Proportional to 89,345.60, 133,864.80 and 58,164.80

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Solution

The fourth proportional to 89,345.60, 133,864.80 and 58,164.80 is: 87,147.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,345.60 : 133,864.80 = 58,164.80 : x
  2. Step 2: Convert to fraction form
    89,345.60/133,864.80 = 58,164.80/x
  3. Step 3: Cross multiply
    89,345.60x = 133,864.80 × 58,164.80
  4. Step 4: Simplify right side
    89,345.60x = 7,786,219,319.04
  5. Step 5: Solve for x
    x = 7,786,219,319.04/89,345.60
  6. Step 6: Final answer
    x = 87,147.20

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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.