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Finding the Fourth Proportional to 157,401.05, 217,207.12 and 85,779.52

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Solution

The fourth proportional to 157,401.05, 217,207.12 and 85,779.52 is: 118,372.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,401.05 : 217,207.12 = 85,779.52 : x
  2. Step 2: Convert to fraction form
    157,401.05/217,207.12 = 85,779.52/x
  3. Step 3: Cross multiply
    157,401.05x = 217,207.12 × 85,779.52
  4. Step 4: Simplify right side
    157,401.05x = 18,631,922,494.18
  5. Step 5: Solve for x
    x = 18,631,922,494.18/157,401.05
  6. Step 6: Final answer
    x = 118,372.29

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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.