Home / 78,302,939.60-117,454,409.40-76,959,246.80

Finding the Fourth Proportional to 78,302,939.60, 117,454,409.40 and 76,959,246.80

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Solution

The fourth proportional to 78,302,939.60, 117,454,409.40 and 76,959,246.80 is: 115,438,870.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,302,939.60 : 117,454,409.40 = 76,959,246.80 : x
  2. Step 2: Convert to fraction form
    78,302,939.60/117,454,409.40 = 76,959,246.80/x
  3. Step 3: Cross multiply
    78,302,939.60x = 117,454,409.40 × 76,959,246.80
  4. Step 4: Simplify right side
    78,302,939.60x = 9,039,202,880,762,840
  5. Step 5: Solve for x
    x = 9,039,202,880,762,840/78,302,939.60
  6. Step 6: Final answer
    x = 115,438,870.20

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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.