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Finding the Fourth Proportional to 121,771.03, 182,671.31 and 42,869.11

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Solution

The fourth proportional to 121,771.03, 182,671.31 and 42,869.11 is: 64,308.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,771.03 : 182,671.31 = 42,869.11 : x
  2. Step 2: Convert to fraction form
    121,771.03/182,671.31 = 42,869.11/x
  3. Step 3: Cross multiply
    121,771.03x = 182,671.31 × 42,869.11
  4. Step 4: Simplify right side
    121,771.03x = 7,830,956,482.23
  5. Step 5: Solve for x
    x = 7,830,956,482.23/121,771.03
  6. Step 6: Final answer
    x = 64,308.86

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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.