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Finding the Fourth Proportional to 72,079.20, 108,118.80 and 60,415.20

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Solution

The fourth proportional to 72,079.20, 108,118.80 and 60,415.20 is: 90,622.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,079.20 : 108,118.80 = 60,415.20 : x
  2. Step 2: Convert to fraction form
    72,079.20/108,118.80 = 60,415.20/x
  3. Step 3: Cross multiply
    72,079.20x = 108,118.80 × 60,415.20
  4. Step 4: Simplify right side
    72,079.20x = 6,532,018,925.76
  5. Step 5: Solve for x
    x = 6,532,018,925.76/72,079.20
  6. Step 6: Final answer
    x = 90,622.80

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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.