Home / 90,658.88-124,665.60-78,701.30

Finding the Fourth Proportional to 90,658.88, 124,665.60 and 78,701.30

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Solution

The fourth proportional to 90,658.88, 124,665.60 and 78,701.30 is: 108,222.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,658.88 : 124,665.60 = 78,701.30 : x
  2. Step 2: Convert to fraction form
    90,658.88/124,665.60 = 78,701.30/x
  3. Step 3: Cross multiply
    90,658.88x = 124,665.60 × 78,701.30
  4. Step 4: Simplify right side
    90,658.88x = 9,811,344,785.28
  5. Step 5: Solve for x
    x = 9,811,344,785.28/90,658.88
  6. Step 6: Final answer
    x = 108,222.66

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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.