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Finding the Fourth Proportional to 66,495,665.20, 99,806,483.40 and 40,986,497.20

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Solution

The fourth proportional to 66,495,665.20, 99,806,483.40 and 40,986,497.20 is: 61,518,568.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,495,665.20 : 99,806,483.40 = 40,986,497.20 : x
  2. Step 2: Convert to fraction form
    66,495,665.20/99,806,483.40 = 40,986,497.20/x
  3. Step 3: Cross multiply
    66,495,665.20x = 99,806,483.40 × 40,986,497.20
  4. Step 4: Simplify right side
    66,495,665.20x = 4,090,718,152,415,947
  5. Step 5: Solve for x
    x = 4,090,718,152,415,947/66,495,665.20
  6. Step 6: Final answer
    x = 61,518,568.77

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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.