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Finding the Fourth Proportional to 72,585,806.40, 108,752,738.40 and 61,248,398.40

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Solution

The fourth proportional to 72,585,806.40, 108,752,738.40 and 61,248,398.40 is: 91,766,302.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,585,806.40 : 108,752,738.40 = 61,248,398.40 : x
  2. Step 2: Convert to fraction form
    72,585,806.40/108,752,738.40 = 61,248,398.40/x
  3. Step 3: Cross multiply
    72,585,806.40x = 108,752,738.40 × 61,248,398.40
  4. Step 4: Simplify right side
    72,585,806.40x = 6,660,931,048,614,179
  5. Step 5: Solve for x
    x = 6,660,931,048,614,179/72,585,806.40
  6. Step 6: Final answer
    x = 91,766,302.24

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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.