Home / 81,648,005.20-122,472,007.80-45,741,547.60

Finding the Fourth Proportional to 81,648,005.20, 122,472,007.80 and 45,741,547.60

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Solution

The fourth proportional to 81,648,005.20, 122,472,007.80 and 45,741,547.60 is: 68,612,321.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,648,005.20 : 122,472,007.80 = 45,741,547.60 : x
  2. Step 2: Convert to fraction form
    81,648,005.20/122,472,007.80 = 45,741,547.60/x
  3. Step 3: Cross multiply
    81,648,005.20x = 122,472,007.80 × 45,741,547.60
  4. Step 4: Simplify right side
    81,648,005.20x = 5,602,059,174,451,271
  5. Step 5: Solve for x
    x = 5,602,059,174,451,271/81,648,005.20
  6. Step 6: Final answer
    x = 68,612,321.40

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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.