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Finding the Fourth Proportional to 85,575.60, 128,017.80 and 74,017.20

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Solution

The fourth proportional to 85,575.60, 128,017.80 and 74,017.20 is: 110,726.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,575.60 : 128,017.80 = 74,017.20 : x
  2. Step 2: Convert to fraction form
    85,575.60/128,017.80 = 74,017.20/x
  3. Step 3: Cross multiply
    85,575.60x = 128,017.80 × 74,017.20
  4. Step 4: Simplify right side
    85,575.60x = 9,475,519,106.16
  5. Step 5: Solve for x
    x = 9,475,519,106.16/85,575.60
  6. Step 6: Final answer
    x = 110,726.88

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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.