Home / 91,311.48-125,775.45-64,406.70

Finding the Fourth Proportional to 91,311.48, 125,775.45 and 64,406.70

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Solution

The fourth proportional to 91,311.48, 125,775.45 and 64,406.70 is: 88,715.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,311.48 : 125,775.45 = 64,406.70 : x
  2. Step 2: Convert to fraction form
    91,311.48/125,775.45 = 64,406.70/x
  3. Step 3: Cross multiply
    91,311.48x = 125,775.45 × 64,406.70
  4. Step 4: Simplify right side
    91,311.48x = 8,100,781,675.52
  5. Step 5: Solve for x
    x = 8,100,781,675.52/91,311.48
  6. Step 6: Final answer
    x = 88,715.92

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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.