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Finding the Fourth Proportional to 153,876.96, 212,326.25 and 85,890.42

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Solution

The fourth proportional to 153,876.96, 212,326.25 and 85,890.42 is: 118,515.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,876.96 : 212,326.25 = 85,890.42 : x
  2. Step 2: Convert to fraction form
    153,876.96/212,326.25 = 85,890.42/x
  3. Step 3: Cross multiply
    153,876.96x = 212,326.25 × 85,890.42
  4. Step 4: Simplify right side
    153,876.96x = 18,236,790,360.07
  5. Step 5: Solve for x
    x = 18,236,790,360.07/153,876.96
  6. Step 6: Final answer
    x = 118,515.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.