Home / 86,402.45-129,588.10-61,340.65

Finding the Fourth Proportional to 86,402.45, 129,588.10 and 61,340.65

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Solution

The fourth proportional to 86,402.45, 129,588.10 and 61,340.65 is: 91,999.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,402.45 : 129,588.10 = 61,340.65 : x
  2. Step 2: Convert to fraction form
    86,402.45/129,588.10 = 61,340.65/x
  3. Step 3: Cross multiply
    86,402.45x = 129,588.10 × 61,340.65
  4. Step 4: Simplify right side
    86,402.45x = 7,949,017,971.75
  5. Step 5: Solve for x
    x = 7,949,017,971.75/86,402.45
  6. Step 6: Final answer
    x = 91,999.92

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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.