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Finding the Fourth Proportional to 86,598.90, 129,941.55 and 49,187.70

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Solution

The fourth proportional to 86,598.90, 129,941.55 and 49,187.70 is: 73,806.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,598.90 : 129,941.55 = 49,187.70 : x
  2. Step 2: Convert to fraction form
    86,598.90/129,941.55 = 49,187.70/x
  3. Step 3: Cross multiply
    86,598.90x = 129,941.55 × 49,187.70
  4. Step 4: Simplify right side
    86,598.90x = 6,391,525,978.94
  5. Step 5: Solve for x
    x = 6,391,525,978.94/86,598.90
  6. Step 6: Final answer
    x = 73,806.09

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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.