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Finding the Fourth Proportional to 85,373.59, 128,079.42 and 26,215.24

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Solution

The fourth proportional to 85,373.59, 128,079.42 and 26,215.24 is: 39,328.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,373.59 : 128,079.42 = 26,215.24 : x
  2. Step 2: Convert to fraction form
    85,373.59/128,079.42 = 26,215.24/x
  3. Step 3: Cross multiply
    85,373.59x = 128,079.42 × 26,215.24
  4. Step 4: Simplify right side
    85,373.59x = 3,357,632,734.36
  5. Step 5: Solve for x
    x = 3,357,632,734.36/85,373.59
  6. Step 6: Final answer
    x = 39,328.70

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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.