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Finding the Fourth Proportional to 85,576.60, 128,019.30 and 74,018.20

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Solution

The fourth proportional to 85,576.60, 128,019.30 and 74,018.20 is: 110,728.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,576.60 : 128,019.30 = 74,018.20 : x
  2. Step 2: Convert to fraction form
    85,576.60/128,019.30 = 74,018.20/x
  3. Step 3: Cross multiply
    85,576.60x = 128,019.30 × 74,018.20
  4. Step 4: Simplify right side
    85,576.60x = 9,475,758,151.26
  5. Step 5: Solve for x
    x = 9,475,758,151.26/85,576.60
  6. Step 6: Final answer
    x = 110,728.38

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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.