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Finding the Fourth Proportional to 72,089.60, 108,060.80 and 48,718.40

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Solution

The fourth proportional to 72,089.60, 108,060.80 and 48,718.40 is: 73,027.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,089.60 : 108,060.80 = 48,718.40 : x
  2. Step 2: Convert to fraction form
    72,089.60/108,060.80 = 48,718.40/x
  3. Step 3: Cross multiply
    72,089.60x = 108,060.80 × 48,718.40
  4. Step 4: Simplify right side
    72,089.60x = 5,264,549,278.72
  5. Step 5: Solve for x
    x = 5,264,549,278.72/72,089.60
  6. Step 6: Final answer
    x = 73,027.86

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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.