Home / 111,439.20-153,787.38-61,138.20

Finding the Fourth Proportional to 111,439.20, 153,787.38 and 61,138.20

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Solution

The fourth proportional to 111,439.20, 153,787.38 and 61,138.20 is: 84,371.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,439.20 : 153,787.38 = 61,138.20 : x
  2. Step 2: Convert to fraction form
    111,439.20/153,787.38 = 61,138.20/x
  3. Step 3: Cross multiply
    111,439.20x = 153,787.38 × 61,138.20
  4. Step 4: Simplify right side
    111,439.20x = 9,402,283,595.92
  5. Step 5: Solve for x
    x = 9,402,283,595.92/111,439.20
  6. Step 6: Final answer
    x = 84,371.42

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1.5x scale

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.