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Finding the Fourth Proportional to 86,210.43, 129,147.54 and 48,656.91

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Solution

The fourth proportional to 86,210.43, 129,147.54 and 48,656.91 is: 72,890.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,210.43 : 129,147.54 = 48,656.91 : x
  2. Step 2: Convert to fraction form
    86,210.43/129,147.54 = 48,656.91/x
  3. Step 3: Cross multiply
    86,210.43x = 129,147.54 × 48,656.91
  4. Step 4: Simplify right side
    86,210.43x = 6,283,920,230.50
  5. Step 5: Solve for x
    x = 6,283,920,230.50/86,210.43
  6. Step 6: Final answer
    x = 72,890.49

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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.