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Finding the Fourth Proportional to 86,686.81, 130,071.42 and 60,073.75

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Solution

The fourth proportional to 86,686.81, 130,071.42 and 60,073.75 is: 90,139.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,686.81 : 130,071.42 = 60,073.75 : x
  2. Step 2: Convert to fraction form
    86,686.81/130,071.42 = 60,073.75/x
  3. Step 3: Cross multiply
    86,686.81x = 130,071.42 × 60,073.75
  4. Step 4: Simplify right side
    86,686.81x = 7,813,878,129.81
  5. Step 5: Solve for x
    x = 7,813,878,129.81/86,686.81
  6. Step 6: Final answer
    x = 90,139.18

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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.