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Finding the Fourth Proportional to 191,875.80, 287,424.90 and 108,672.60

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Solution

The fourth proportional to 191,875.80, 287,424.90 and 108,672.60 is: 162,788.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,875.80 : 287,424.90 = 108,672.60 : x
  2. Step 2: Convert to fraction form
    191,875.80/287,424.90 = 108,672.60/x
  3. Step 3: Cross multiply
    191,875.80x = 287,424.90 × 108,672.60
  4. Step 4: Simplify right side
    191,875.80x = 31,235,211,187.74
  5. Step 5: Solve for x
    x = 31,235,211,187.74/191,875.80
  6. Step 6: Final answer
    x = 162,788.70

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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.