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Finding the Fourth Proportional to 72,447,205.80, 108,670,808.70 and 65,280,844.20

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Solution

The fourth proportional to 72,447,205.80, 108,670,808.70 and 65,280,844.20 is: 97,921,266.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,447,205.80 : 108,670,808.70 = 65,280,844.20 : x
  2. Step 2: Convert to fraction form
    72,447,205.80/108,670,808.70 = 65,280,844.20/x
  3. Step 3: Cross multiply
    72,447,205.80x = 108,670,808.70 × 65,280,844.20
  4. Step 4: Simplify right side
    72,447,205.80x = 7,094,122,131,832,705
  5. Step 5: Solve for x
    x = 7,094,122,131,832,705/72,447,205.80
  6. Step 6: Final answer
    x = 97,921,266.30

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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.