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Finding the Fourth Proportional to 191,903.60, 287,855.40 and 125,418.80

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Solution

The fourth proportional to 191,903.60, 287,855.40 and 125,418.80 is: 188,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,903.60 : 287,855.40 = 125,418.80 : x
  2. Step 2: Convert to fraction form
    191,903.60/287,855.40 = 125,418.80/x
  3. Step 3: Cross multiply
    191,903.60x = 287,855.40 × 125,418.80
  4. Step 4: Simplify right side
    191,903.60x = 36,102,478,841.52
  5. Step 5: Solve for x
    x = 36,102,478,841.52/191,903.60
  6. Step 6: Final answer
    x = 188,128.20

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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.