Home / 239,085.12-358,627.68-81,426.72

Finding the Fourth Proportional to 239,085.12, 358,627.68 and 81,426.72

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Solution

The fourth proportional to 239,085.12, 358,627.68 and 81,426.72 is: 122,140.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,085.12 : 358,627.68 = 81,426.72 : x
  2. Step 2: Convert to fraction form
    239,085.12/358,627.68 = 81,426.72/x
  3. Step 3: Cross multiply
    239,085.12x = 358,627.68 × 81,426.72
  4. Step 4: Simplify right side
    239,085.12x = 29,201,875,683.61
  5. Step 5: Solve for x
    x = 29,201,875,683.61/239,085.12
  6. Step 6: Final answer
    x = 122,140.08

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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.