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Finding the Fourth Proportional to 72,695,302.80, 109,042,954.20 and 52,287,968.40

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Solution

The fourth proportional to 72,695,302.80, 109,042,954.20 and 52,287,968.40 is: 78,431,952.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,695,302.80 : 109,042,954.20 = 52,287,968.40 : x
  2. Step 2: Convert to fraction form
    72,695,302.80/109,042,954.20 = 52,287,968.40/x
  3. Step 3: Cross multiply
    72,695,302.80x = 109,042,954.20 × 52,287,968.40
  4. Step 4: Simplify right side
    72,695,302.80x = 5,701,634,543,452,247
  5. Step 5: Solve for x
    x = 5,701,634,543,452,247/72,695,302.80
  6. Step 6: Final answer
    x = 78,431,952.60

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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.