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Finding the Fourth Proportional to 90,815.76, 125,325.88 and 51,071.76

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Solution

The fourth proportional to 90,815.76, 125,325.88 and 51,071.76 is: 70,479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,815.76 : 125,325.88 = 51,071.76 : x
  2. Step 2: Convert to fraction form
    90,815.76/125,325.88 = 51,071.76/x
  3. Step 3: Cross multiply
    90,815.76x = 125,325.88 × 51,071.76
  4. Step 4: Simplify right side
    90,815.76x = 6,400,613,265.15
  5. Step 5: Solve for x
    x = 6,400,613,265.15/90,815.76
  6. Step 6: Final answer
    x = 70,479.10

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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.