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Finding the Fourth Proportional to 157,430.62, 217,255.25 and 85,810.47

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Solution

The fourth proportional to 157,430.62, 217,255.25 and 85,810.47 is: 118,418.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,430.62 : 217,255.25 = 85,810.47 : x
  2. Step 2: Convert to fraction form
    157,430.62/217,255.25 = 85,810.47/x
  3. Step 3: Cross multiply
    157,430.62x = 217,255.25 × 85,810.47
  4. Step 4: Simplify right side
    157,430.62x = 18,642,775,112.47
  5. Step 5: Solve for x
    x = 18,642,775,112.47/157,430.62
  6. Step 6: Final answer
    x = 118,418.99

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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.