Home / 85,715.28-128,349.27-68,983.92

Finding the Fourth Proportional to 85,715.28, 128,349.27 and 68,983.92

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Solution

The fourth proportional to 85,715.28, 128,349.27 and 68,983.92 is: 103,295.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,715.28 : 128,349.27 = 68,983.92 : x
  2. Step 2: Convert to fraction form
    85,715.28/128,349.27 = 68,983.92/x
  3. Step 3: Cross multiply
    85,715.28x = 128,349.27 × 68,983.92
  4. Step 4: Simplify right side
    85,715.28x = 8,854,035,773.74
  5. Step 5: Solve for x
    x = 8,854,035,773.74/85,715.28
  6. Step 6: Final answer
    x = 103,295.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.