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Finding the Fourth Proportional to 153,929.20, 214,976 and 153,929.20

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Solution

The fourth proportional to 153,929.20, 214,976 and 153,929.20 is: 214,976

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,929.20 : 214,976 = 153,929.20 : x
  2. Step 2: Convert to fraction form
    153,929.20/214,976 = 153,929.20/x
  3. Step 3: Cross multiply
    153,929.20x = 214,976 × 153,929.20
  4. Step 4: Simplify right side
    153,929.20x = 33,091,083,699.20
  5. Step 5: Solve for x
    x = 33,091,083,699.20/153,929.20
  6. Step 6: Final answer
    x = 214,976

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.