Home / 145,539.90-217,872.45-86,345.10

Finding the Fourth Proportional to 145,539.90, 217,872.45 and 86,345.10

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Solution

The fourth proportional to 145,539.90, 217,872.45 and 86,345.10 is: 129,258.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,539.90 : 217,872.45 = 86,345.10 : x
  2. Step 2: Convert to fraction form
    145,539.90/217,872.45 = 86,345.10/x
  3. Step 3: Cross multiply
    145,539.90x = 217,872.45 × 86,345.10
  4. Step 4: Simplify right side
    145,539.90x = 18,812,218,482.50
  5. Step 5: Solve for x
    x = 18,812,218,482.50/145,539.90
  6. Step 6: Final answer
    x = 129,258.15

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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.