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Finding the Fourth Proportional to 66,495,639.20, 99,806,444.40 and 40,986,471.20

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Solution

The fourth proportional to 66,495,639.20, 99,806,444.40 and 40,986,471.20 is: 61,518,529.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,495,639.20 : 99,806,444.40 = 40,986,471.20 : x
  2. Step 2: Convert to fraction form
    66,495,639.20/99,806,444.40 = 40,986,471.20/x
  3. Step 3: Cross multiply
    66,495,639.20x = 99,806,444.40 × 40,986,471.20
  4. Step 4: Simplify right side
    66,495,639.20x = 4,090,713,958,975,002
  5. Step 5: Solve for x
    x = 4,090,713,958,975,002/66,495,639.20
  6. Step 6: Final answer
    x = 61,518,529.76

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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.