Home / 86,719.68-130,088.16-39,985.92

Finding the Fourth Proportional to 86,719.68, 130,088.16 and 39,985.92

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Solution

The fourth proportional to 86,719.68, 130,088.16 and 39,985.92 is: 59,982.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,719.68 : 130,088.16 = 39,985.92 : x
  2. Step 2: Convert to fraction form
    86,719.68/130,088.16 = 39,985.92/x
  3. Step 3: Cross multiply
    86,719.68x = 130,088.16 × 39,985.92
  4. Step 4: Simplify right side
    86,719.68x = 5,201,694,758.71
  5. Step 5: Solve for x
    x = 5,201,694,758.71/86,719.68
  6. Step 6: Final answer
    x = 59,982.86

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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.