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Finding the Fourth Proportional to 100,917.90, 151,210.80 and 61,355.88

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Solution

The fourth proportional to 100,917.90, 151,210.80 and 61,355.88 is: 91,932.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,917.90 : 151,210.80 = 61,355.88 : x
  2. Step 2: Convert to fraction form
    100,917.90/151,210.80 = 61,355.88/x
  3. Step 3: Cross multiply
    100,917.90x = 151,210.80 × 61,355.88
  4. Step 4: Simplify right side
    100,917.90x = 9,277,671,699.50
  5. Step 5: Solve for x
    x = 9,277,671,699.50/100,917.90
  6. Step 6: Final answer
    x = 91,932.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.