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Finding the Fourth Proportional to 153,104.65, 211,387.53 and 136,921.66

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Solution

The fourth proportional to 153,104.65, 211,387.53 and 136,921.66 is: 189,044.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,104.65 : 211,387.53 = 136,921.66 : x
  2. Step 2: Convert to fraction form
    153,104.65/211,387.53 = 136,921.66/x
  3. Step 3: Cross multiply
    153,104.65x = 211,387.53 × 136,921.66
  4. Step 4: Simplify right side
    153,104.65x = 28,943,531,510.90
  5. Step 5: Solve for x
    x = 28,943,531,510.90/153,104.65
  6. Step 6: Final answer
    x = 189,044.10

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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.