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Finding the Fourth Proportional to 85,373.47, 128,048.17 and 53,686.92

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Solution

The fourth proportional to 85,373.47, 128,048.17 and 53,686.92 is: 80,522.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,373.47 : 128,048.17 = 53,686.92 : x
  2. Step 2: Convert to fraction form
    85,373.47/128,048.17 = 53,686.92/x
  3. Step 3: Cross multiply
    85,373.47x = 128,048.17 × 53,686.92
  4. Step 4: Simplify right side
    85,373.47x = 6,874,511,704.40
  5. Step 5: Solve for x
    x = 6,874,511,704.40/85,373.47
  6. Step 6: Final answer
    x = 80,522.81

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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.