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Finding the Fourth Proportional to 191,819.60, 287,729.40 and 122,008.40

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Solution

The fourth proportional to 191,819.60, 287,729.40 and 122,008.40 is: 183,012.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,819.60 : 287,729.40 = 122,008.40 : x
  2. Step 2: Convert to fraction form
    191,819.60/287,729.40 = 122,008.40/x
  3. Step 3: Cross multiply
    191,819.60x = 287,729.40 × 122,008.40
  4. Step 4: Simplify right side
    191,819.60x = 35,105,403,726.96
  5. Step 5: Solve for x
    x = 35,105,403,726.96/191,819.60
  6. Step 6: Final answer
    x = 183,012.60

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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.