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Finding the Fourth Proportional to 72,740.76, 109,089.24 and 47,779.80

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Solution

The fourth proportional to 72,740.76, 109,089.24 and 47,779.80 is: 71,655.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,740.76 : 109,089.24 = 47,779.80 : x
  2. Step 2: Convert to fraction form
    72,740.76/109,089.24 = 47,779.80/x
  3. Step 3: Cross multiply
    72,740.76x = 109,089.24 × 47,779.80
  4. Step 4: Simplify right side
    72,740.76x = 5,212,262,069.35
  5. Step 5: Solve for x
    x = 5,212,262,069.35/72,740.76
  6. Step 6: Final answer
    x = 71,655.31

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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.