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Finding the Fourth Proportional to 86,690.92, 130,077.60 and 60,077.83

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Solution

The fourth proportional to 86,690.92, 130,077.60 and 60,077.83 is: 90,145.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,690.92 : 130,077.60 = 60,077.83 : x
  2. Step 2: Convert to fraction form
    86,690.92/130,077.60 = 60,077.83/x
  3. Step 3: Cross multiply
    86,690.92x = 130,077.60 × 60,077.83
  4. Step 4: Simplify right side
    86,690.92x = 7,814,779,939.61
  5. Step 5: Solve for x
    x = 7,814,779,939.61/86,690.92
  6. Step 6: Final answer
    x = 90,145.31

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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.