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Finding the Fourth Proportional to 86,909.65, 119,937.14 and 52,919.57

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Solution

The fourth proportional to 86,909.65, 119,937.14 and 52,919.57 is: 73,030.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,909.65 : 119,937.14 = 52,919.57 : x
  2. Step 2: Convert to fraction form
    86,909.65/119,937.14 = 52,919.57/x
  3. Step 3: Cross multiply
    86,909.65x = 119,937.14 × 52,919.57
  4. Step 4: Simplify right side
    86,909.65x = 6,347,021,875.83
  5. Step 5: Solve for x
    x = 6,347,021,875.83/86,909.65
  6. Step 6: Final answer
    x = 73,030.12

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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.