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Finding the Fourth Proportional to 157,028.85, 216,693.52 and 85,408.92

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Solution

The fourth proportional to 157,028.85, 216,693.52 and 85,408.92 is: 117,860.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,028.85 : 216,693.52 = 85,408.92 : x
  2. Step 2: Convert to fraction form
    157,028.85/216,693.52 = 85,408.92/x
  3. Step 3: Cross multiply
    157,028.85x = 216,693.52 × 85,408.92
  4. Step 4: Simplify right side
    157,028.85x = 18,507,559,514.20
  5. Step 5: Solve for x
    x = 18,507,559,514.20/157,028.85
  6. Step 6: Final answer
    x = 117,860.89

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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.