Home / 112,424.92-155,148.60-61,440.80

Finding the Fourth Proportional to 112,424.92, 155,148.60 and 61,440.80

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Solution

The fourth proportional to 112,424.92, 155,148.60 and 61,440.80 is: 84,789.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,424.92 : 155,148.60 = 61,440.80 : x
  2. Step 2: Convert to fraction form
    112,424.92/155,148.60 = 61,440.80/x
  3. Step 3: Cross multiply
    112,424.92x = 155,148.60 × 61,440.80
  4. Step 4: Simplify right side
    112,424.92x = 9,532,454,102.88
  5. Step 5: Solve for x
    x = 9,532,454,102.88/112,424.92
  6. Step 6: Final answer
    x = 84,789.52

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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.