Home / 78,230,017.80-117,345,026.70-20,728,101.60

Finding the Fourth Proportional to 78,230,017.80, 117,345,026.70 and 20,728,101.60

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Solution

The fourth proportional to 78,230,017.80, 117,345,026.70 and 20,728,101.60 is: 31,092,152.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,230,017.80 : 117,345,026.70 = 20,728,101.60 : x
  2. Step 2: Convert to fraction form
    78,230,017.80/117,345,026.70 = 20,728,101.60/x
  3. Step 3: Cross multiply
    78,230,017.80x = 117,345,026.70 × 20,728,101.60
  4. Step 4: Simplify right side
    78,230,017.80x = 2,432,339,635,692,313
  5. Step 5: Solve for x
    x = 2,432,339,635,692,313/78,230,017.80
  6. Step 6: Final answer
    x = 31,092,152.40

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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.