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Finding the Fourth Proportional to 72,760,657.20, 109,140,985.80 and 72,760,657.20

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Solution

The fourth proportional to 72,760,657.20, 109,140,985.80 and 72,760,657.20 is: 109,140,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,760,657.20 : 109,140,985.80 = 72,760,657.20 : x
  2. Step 2: Convert to fraction form
    72,760,657.20/109,140,985.80 = 72,760,657.20/x
  3. Step 3: Cross multiply
    72,760,657.20x = 109,140,985.80 × 72,760,657.20
  4. Step 4: Simplify right side
    72,760,657.20x = 7,941,169,854,263,868
  5. Step 5: Solve for x
    x = 7,941,169,854,263,868/72,760,657.20
  6. Step 6: Final answer
    x = 109,140,985.80

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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.