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Finding the Fourth Proportional to 153,551.70, 211,900.86 and 89,876.79

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Solution

The fourth proportional to 153,551.70, 211,900.86 and 89,876.79 is: 124,029.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,551.70 : 211,900.86 = 89,876.79 : x
  2. Step 2: Convert to fraction form
    153,551.70/211,900.86 = 89,876.79/x
  3. Step 3: Cross multiply
    153,551.70x = 211,900.86 × 89,876.79
  4. Step 4: Simplify right side
    153,551.70x = 19,044,969,095.04
  5. Step 5: Solve for x
    x = 19,044,969,095.04/153,551.70
  6. Step 6: Final answer
    x = 124,029.69

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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.