Home / 81,649,901.10-122,474,851.65-78,878,534.70

Finding the Fourth Proportional to 81,649,901.10, 122,474,851.65 and 78,878,534.70

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Solution

The fourth proportional to 81,649,901.10, 122,474,851.65 and 78,878,534.70 is: 118,317,802.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,649,901.10 : 122,474,851.65 = 78,878,534.70 : x
  2. Step 2: Convert to fraction form
    81,649,901.10/122,474,851.65 = 78,878,534.70/x
  3. Step 3: Cross multiply
    81,649,901.10x = 122,474,851.65 × 78,878,534.70
  4. Step 4: Simplify right side
    81,649,901.10x = 9,660,636,835,751,878
  5. Step 5: Solve for x
    x = 9,660,636,835,751,878/81,649,901.10
  6. Step 6: Final answer
    x = 118,317,802.05

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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.