Home / 128,281,140.30-177,021,155.60-72,523,227.05

Finding the Fourth Proportional to 128,281,140.30, 177,021,155.60 and 72,523,227.05

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Solution

The fourth proportional to 128,281,140.30, 177,021,155.60 and 72,523,227.05 is: 100,078,198.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,281,140.30 : 177,021,155.60 = 72,523,227.05 : x
  2. Step 2: Convert to fraction form
    128,281,140.30/177,021,155.60 = 72,523,227.05/x
  3. Step 3: Cross multiply
    128,281,140.30x = 177,021,155.60 × 72,523,227.05
  4. Step 4: Simplify right side
    128,281,140.30x = 12,838,145,460,856,038
  5. Step 5: Solve for x
    x = 12,838,145,460,856,038/128,281,140.30
  6. Step 6: Final answer
    x = 100,078,198.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.