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Finding the Fourth Proportional to 157,430.56, 217,254 and 85,810.72

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Solution

The fourth proportional to 157,430.56, 217,254 and 85,810.72 is: 118,418.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,430.56 : 217,254 = 85,810.72 : x
  2. Step 2: Convert to fraction form
    157,430.56/217,254 = 85,810.72/x
  3. Step 3: Cross multiply
    157,430.56x = 217,254 × 85,810.72
  4. Step 4: Simplify right side
    157,430.56x = 18,642,722,162.88
  5. Step 5: Solve for x
    x = 18,642,722,162.88/157,430.56
  6. Step 6: Final answer
    x = 118,418.70

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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.