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Finding the Fourth Proportional to 87,014.70, 130,522.05 and 85,848.30

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Solution

The fourth proportional to 87,014.70, 130,522.05 and 85,848.30 is: 128,772.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,014.70 : 130,522.05 = 85,848.30 : x
  2. Step 2: Convert to fraction form
    87,014.70/130,522.05 = 85,848.30/x
  3. Step 3: Cross multiply
    87,014.70x = 130,522.05 × 85,848.30
  4. Step 4: Simplify right side
    87,014.70x = 11,205,096,105.02
  5. Step 5: Solve for x
    x = 11,205,096,105.02/87,014.70
  6. Step 6: Final answer
    x = 128,772.45

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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.