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Finding the Fourth Proportional to 82,959,993.60, 124,439,990.40 and 65,641,286.40

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Solution

The fourth proportional to 82,959,993.60, 124,439,990.40 and 65,641,286.40 is: 98,461,929.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,959,993.60 : 124,439,990.40 = 65,641,286.40 : x
  2. Step 2: Convert to fraction form
    82,959,993.60/124,439,990.40 = 65,641,286.40/x
  3. Step 3: Cross multiply
    82,959,993.60x = 124,439,990.40 × 65,641,286.40
  4. Step 4: Simplify right side
    82,959,993.60x = 8,168,401,049,459,651
  5. Step 5: Solve for x
    x = 8,168,401,049,459,651/82,959,993.60
  6. Step 6: Final answer
    x = 98,461,929.60

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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.