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Finding the Fourth Proportional to 157,622.85, 217,598.85 and 100,319.85

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Solution

The fourth proportional to 157,622.85, 217,598.85 and 100,319.85 is: 138,491.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,622.85 : 217,598.85 = 100,319.85 : x
  2. Step 2: Convert to fraction form
    157,622.85/217,598.85 = 100,319.85/x
  3. Step 3: Cross multiply
    157,622.85x = 217,598.85 × 100,319.85
  4. Step 4: Simplify right side
    157,622.85x = 21,829,483,992.17
  5. Step 5: Solve for x
    x = 21,829,483,992.17/157,622.85
  6. Step 6: Final answer
    x = 138,491.87

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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.