Home / 208,278,079.20-287,453,048.54-128,918,613.11

Finding the Fourth Proportional to 208,278,079.20, 287,453,048.54 and 128,918,613.11

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Solution

The fourth proportional to 208,278,079.20, 287,453,048.54 and 128,918,613.11 is: 177,925,821.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,278,079.20 : 287,453,048.54 = 128,918,613.11 : x
  2. Step 2: Convert to fraction form
    208,278,079.20/287,453,048.54 = 128,918,613.11/x
  3. Step 3: Cross multiply
    208,278,079.20x = 287,453,048.54 × 128,918,613.11
  4. Step 4: Simplify right side
    208,278,079.20x = 37,058,048,349,936,456
  5. Step 5: Solve for x
    x = 37,058,048,349,936,456/208,278,079.20
  6. Step 6: Final answer
    x = 177,925,821.54

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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.