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Finding the Fourth Proportional to 67,280.60, 101,139.60 and 57,657.80

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Solution

The fourth proportional to 67,280.60, 101,139.60 and 57,657.80 is: 86,674.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,280.60 : 101,139.60 = 57,657.80 : x
  2. Step 2: Convert to fraction form
    67,280.60/101,139.60 = 57,657.80/x
  3. Step 3: Cross multiply
    67,280.60x = 101,139.60 × 57,657.80
  4. Step 4: Simplify right side
    67,280.60x = 5,831,486,828.88
  5. Step 5: Solve for x
    x = 5,831,486,828.88/67,280.60
  6. Step 6: Final answer
    x = 86,674.12

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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.