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Finding the Fourth Proportional to 153,456.72, 211,780.91 and 93,029.91

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Solution

The fourth proportional to 153,456.72, 211,780.91 and 93,029.91 is: 128,387.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,456.72 : 211,780.91 = 93,029.91 : x
  2. Step 2: Convert to fraction form
    153,456.72/211,780.91 = 93,029.91/x
  3. Step 3: Cross multiply
    153,456.72x = 211,780.91 × 93,029.91
  4. Step 4: Simplify right side
    153,456.72x = 19,701,958,531.87
  5. Step 5: Solve for x
    x = 19,701,958,531.87/153,456.72
  6. Step 6: Final answer
    x = 128,387.72

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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.