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Finding the Fourth Proportional to 72,401,872.80, 108,602,809.20 and 64,465,687.20

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Solution

The fourth proportional to 72,401,872.80, 108,602,809.20 and 64,465,687.20 is: 96,698,530.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,401,872.80 : 108,602,809.20 = 64,465,687.20 : x
  2. Step 2: Convert to fraction form
    72,401,872.80/108,602,809.20 = 64,465,687.20/x
  3. Step 3: Cross multiply
    72,401,872.80x = 108,602,809.20 × 64,465,687.20
  4. Step 4: Simplify right side
    72,401,872.80x = 7,001,154,726,928,483
  5. Step 5: Solve for x
    x = 7,001,154,726,928,483/72,401,872.80
  6. Step 6: Final answer
    x = 96,698,530.80

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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.