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Finding the Fourth Proportional to 151,291.68, 208,780.65 and 83,307.21

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Solution

The fourth proportional to 151,291.68, 208,780.65 and 83,307.21 is: 114,962.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,291.68 : 208,780.65 = 83,307.21 : x
  2. Step 2: Convert to fraction form
    151,291.68/208,780.65 = 83,307.21/x
  3. Step 3: Cross multiply
    151,291.68x = 208,780.65 × 83,307.21
  4. Step 4: Simplify right side
    151,291.68x = 17,392,933,453.49
  5. Step 5: Solve for x
    x = 17,392,933,453.49/151,291.68
  6. Step 6: Final answer
    x = 114,962.92

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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.