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Finding the Fourth Proportional to 86,807.79, 130,001.40 and 60,078.87

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Solution

The fourth proportional to 86,807.79, 130,001.40 and 60,078.87 is: 89,972.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,807.79 : 130,001.40 = 60,078.87 : x
  2. Step 2: Convert to fraction form
    86,807.79/130,001.40 = 60,078.87/x
  3. Step 3: Cross multiply
    86,807.79x = 130,001.40 × 60,078.87
  4. Step 4: Simplify right side
    86,807.79x = 7,810,337,210.42
  5. Step 5: Solve for x
    x = 7,810,337,210.42/86,807.79
  6. Step 6: Final answer
    x = 89,972.77

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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.