Home / 91,500.48-126,008.64-78,649.92

Finding the Fourth Proportional to 91,500.48, 126,008.64 and 78,649.92

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Solution

The fourth proportional to 91,500.48, 126,008.64 and 78,649.92 is: 108,311.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,500.48 : 126,008.64 = 78,649.92 : x
  2. Step 2: Convert to fraction form
    91,500.48/126,008.64 = 78,649.92/x
  3. Step 3: Cross multiply
    91,500.48x = 126,008.64 × 78,649.92
  4. Step 4: Simplify right side
    91,500.48x = 9,910,569,455.31
  5. Step 5: Solve for x
    x = 9,910,569,455.31/91,500.48
  6. Step 6: Final answer
    x = 108,311.67

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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.