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Finding the Fourth Proportional to 191,741.20, 287,698.20 and 91,862.80

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Solution

The fourth proportional to 191,741.20, 287,698.20 and 91,862.80 is: 137,835.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,741.20 : 287,698.20 = 91,862.80 : x
  2. Step 2: Convert to fraction form
    191,741.20/287,698.20 = 91,862.80/x
  3. Step 3: Cross multiply
    191,741.20x = 287,698.20 × 91,862.80
  4. Step 4: Simplify right side
    191,741.20x = 26,428,762,206.96
  5. Step 5: Solve for x
    x = 26,428,762,206.96/191,741.20
  6. Step 6: Final answer
    x = 137,835.59

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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.