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Finding the Fourth Proportional to 86,641.30, 130,010.55 and 36,712.90

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Solution

The fourth proportional to 86,641.30, 130,010.55 and 36,712.90 is: 55,089.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,641.30 : 130,010.55 = 36,712.90 : x
  2. Step 2: Convert to fraction form
    86,641.30/130,010.55 = 36,712.90/x
  3. Step 3: Cross multiply
    86,641.30x = 130,010.55 × 36,712.90
  4. Step 4: Simplify right side
    86,641.30x = 4,773,064,321.10
  5. Step 5: Solve for x
    x = 4,773,064,321.10/86,641.30
  6. Step 6: Final answer
    x = 55,089.94

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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.