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Finding the Fourth Proportional to 191,903.10, 287,854.65 and 125,418.30

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Solution

The fourth proportional to 191,903.10, 287,854.65 and 125,418.30 is: 188,127.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,903.10 : 287,854.65 = 125,418.30 : x
  2. Step 2: Convert to fraction form
    191,903.10/287,854.65 = 125,418.30/x
  3. Step 3: Cross multiply
    191,903.10x = 287,854.65 × 125,418.30
  4. Step 4: Simplify right side
    191,903.10x = 36,102,240,850.10
  5. Step 5: Solve for x
    x = 36,102,240,850.10/191,903.10
  6. Step 6: Final answer
    x = 188,127.45

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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.