Home / 154,617.12-213,375.02-86,639.20

Finding the Fourth Proportional to 154,617.12, 213,375.02 and 86,639.20

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Solution

The fourth proportional to 154,617.12, 213,375.02 and 86,639.20 is: 119,564.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,617.12 : 213,375.02 = 86,639.20 : x
  2. Step 2: Convert to fraction form
    154,617.12/213,375.02 = 86,639.20/x
  3. Step 3: Cross multiply
    154,617.12x = 213,375.02 × 86,639.20
  4. Step 4: Simplify right side
    154,617.12x = 18,486,641,032.78
  5. Step 5: Solve for x
    x = 18,486,641,032.78/154,617.12
  6. Step 6: Final answer
    x = 119,564.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.