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Finding the Fourth Proportional to 72,401,908.80, 108,602,863.20 and 64,465,723.20

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Solution

The fourth proportional to 72,401,908.80, 108,602,863.20 and 64,465,723.20 is: 96,698,584.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,401,908.80 : 108,602,863.20 = 64,465,723.20 : x
  2. Step 2: Convert to fraction form
    72,401,908.80/108,602,863.20 = 64,465,723.20/x
  3. Step 3: Cross multiply
    72,401,908.80x = 108,602,863.20 × 64,465,723.20
  4. Step 4: Simplify right side
    72,401,908.80x = 7,001,162,117,778,667
  5. Step 5: Solve for x
    x = 7,001,162,117,778,667/72,401,908.80
  6. Step 6: Final answer
    x = 96,698,584.80

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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.