Home / 81,648,005.20-122,472,007.80-66,342,504.40

Finding the Fourth Proportional to 81,648,005.20, 122,472,007.80 and 66,342,504.40

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Solution

The fourth proportional to 81,648,005.20, 122,472,007.80 and 66,342,504.40 is: 99,513,756.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,648,005.20 : 122,472,007.80 = 66,342,504.40 : x
  2. Step 2: Convert to fraction form
    81,648,005.20/122,472,007.80 = 66,342,504.40/x
  3. Step 3: Cross multiply
    81,648,005.20x = 122,472,007.80 × 66,342,504.40
  4. Step 4: Simplify right side
    81,648,005.20x = 8,125,099,716,348,334
  5. Step 5: Solve for x
    x = 8,125,099,716,348,334/81,648,005.20
  6. Step 6: Final answer
    x = 99,513,756.60

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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.