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Finding the Fourth Proportional to 85,393.47, 128,001.01 and 29,216.95

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Solution

The fourth proportional to 85,393.47, 128,001.01 and 29,216.95 is: 43,794.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,393.47 : 128,001.01 = 29,216.95 : x
  2. Step 2: Convert to fraction form
    85,393.47/128,001.01 = 29,216.95/x
  3. Step 3: Cross multiply
    85,393.47x = 128,001.01 × 29,216.95
  4. Step 4: Simplify right side
    85,393.47x = 3,739,799,490.86
  5. Step 5: Solve for x
    x = 3,739,799,490.86/85,393.47
  6. Step 6: Final answer
    x = 43,794.91

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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.