Home / 84,995,790.40-127,493,685.60-78,193,345.60

Finding the Fourth Proportional to 84,995,790.40, 127,493,685.60 and 78,193,345.60

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Solution

The fourth proportional to 84,995,790.40, 127,493,685.60 and 78,193,345.60 is: 117,290,018.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,995,790.40 : 127,493,685.60 = 78,193,345.60 : x
  2. Step 2: Convert to fraction form
    84,995,790.40/127,493,685.60 = 78,193,345.60/x
  3. Step 3: Cross multiply
    84,995,790.40x = 127,493,685.60 × 78,193,345.60
  4. Step 4: Simplify right side
    84,995,790.40x = 9,969,157,819,938,542
  5. Step 5: Solve for x
    x = 9,969,157,819,938,542/84,995,790.40
  6. Step 6: Final answer
    x = 117,290,018.40

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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.