Home / 85,515.08-128,155.98-52,246.76

Finding the Fourth Proportional to 85,515.08, 128,155.98 and 52,246.76

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Solution

The fourth proportional to 85,515.08, 128,155.98 and 52,246.76 is: 78,298.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,515.08 : 128,155.98 = 52,246.76 : x
  2. Step 2: Convert to fraction form
    85,515.08/128,155.98 = 52,246.76/x
  3. Step 3: Cross multiply
    85,515.08x = 128,155.98 × 52,246.76
  4. Step 4: Simplify right side
    85,515.08x = 6,695,734,729.62
  5. Step 5: Solve for x
    x = 6,695,734,729.62/85,515.08
  6. Step 6: Final answer
    x = 78,298.88

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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.