Home / 208,049,945.60-287,000,073.78-128,639,622.57

Finding the Fourth Proportional to 208,049,945.60, 287,000,073.78 and 128,639,622.57

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Solution

The fourth proportional to 208,049,945.60, 287,000,073.78 and 128,639,622.57 is: 177,455,375.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,049,945.60 : 287,000,073.78 = 128,639,622.57 : x
  2. Step 2: Convert to fraction form
    208,049,945.60/287,000,073.78 = 128,639,622.57/x
  3. Step 3: Cross multiply
    208,049,945.60x = 287,000,073.78 × 128,639,622.57
  4. Step 4: Simplify right side
    208,049,945.60x = 36,919,581,168,621,344
  5. Step 5: Solve for x
    x = 36,919,581,168,621,344/208,049,945.60
  6. Step 6: Final answer
    x = 177,455,375.26

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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.