Home / 90,821.31-125,336.39-56,818.92

Finding the Fourth Proportional to 90,821.31, 125,336.39 and 56,818.92

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Solution

The fourth proportional to 90,821.31, 125,336.39 and 56,818.92 is: 78,411.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,821.31 : 125,336.39 = 56,818.92 : x
  2. Step 2: Convert to fraction form
    90,821.31/125,336.39 = 56,818.92/x
  3. Step 3: Cross multiply
    90,821.31x = 125,336.39 × 56,818.92
  4. Step 4: Simplify right side
    90,821.31x = 7,121,478,316.50
  5. Step 5: Solve for x
    x = 7,121,478,316.50/90,821.31
  6. Step 6: Final answer
    x = 78,411.98

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Double scale
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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.