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Finding the Fourth Proportional to 86,437.10, 119,011.74 and 73,490.91

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Solution

The fourth proportional to 86,437.10, 119,011.74 and 73,490.91 is: 101,186.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,437.10 : 119,011.74 = 73,490.91 : x
  2. Step 2: Convert to fraction form
    86,437.10/119,011.74 = 73,490.91/x
  3. Step 3: Cross multiply
    86,437.10x = 119,011.74 × 73,490.91
  4. Step 4: Simplify right side
    86,437.10x = 8,746,281,073.28
  5. Step 5: Solve for x
    x = 8,746,281,073.28/86,437.10
  6. Step 6: Final answer
    x = 101,186.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.