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Finding the Fourth Proportional to 421,374.72, 632,080.53 and 121,885.57

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Solution

The fourth proportional to 421,374.72, 632,080.53 and 121,885.57 is: 182,833.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,374.72 : 632,080.53 = 121,885.57 : x
  2. Step 2: Convert to fraction form
    421,374.72/632,080.53 = 121,885.57/x
  3. Step 3: Cross multiply
    421,374.72x = 632,080.53 × 121,885.57
  4. Step 4: Simplify right side
    421,374.72x = 77,041,495,684.95
  5. Step 5: Solve for x
    x = 77,041,495,684.95/421,374.72
  6. Step 6: Final answer
    x = 182,833.69

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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.