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Finding the Fourth Proportional to 72,089.40, 108,134.10 and 66,840.60

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Solution

The fourth proportional to 72,089.40, 108,134.10 and 66,840.60 is: 100,260.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,089.40 : 108,134.10 = 66,840.60 : x
  2. Step 2: Convert to fraction form
    72,089.40/108,134.10 = 66,840.60/x
  3. Step 3: Cross multiply
    72,089.40x = 108,134.10 × 66,840.60
  4. Step 4: Simplify right side
    72,089.40x = 7,227,748,124.46
  5. Step 5: Solve for x
    x = 7,227,748,124.46/72,089.40
  6. Step 6: Final answer
    x = 100,260.90

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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.