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Finding the Fourth Proportional to 191,279.20, 286,918.80 and 121,237.60

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Solution

The fourth proportional to 191,279.20, 286,918.80 and 121,237.60 is: 181,856.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,279.20 : 286,918.80 = 121,237.60 : x
  2. Step 2: Convert to fraction form
    191,279.20/286,918.80 = 121,237.60/x
  3. Step 3: Cross multiply
    191,279.20x = 286,918.80 × 121,237.60
  4. Step 4: Simplify right side
    191,279.20x = 34,785,346,706.88
  5. Step 5: Solve for x
    x = 34,785,346,706.88/191,279.20
  6. Step 6: Final answer
    x = 181,856.40

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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.