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Finding the Fourth Proportional to 111,695.68, 153,996.32 and 91,478.08

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Solution

The fourth proportional to 111,695.68, 153,996.32 and 91,478.08 is: 126,122.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,695.68 : 153,996.32 = 91,478.08 : x
  2. Step 2: Convert to fraction form
    111,695.68/153,996.32 = 91,478.08/x
  3. Step 3: Cross multiply
    111,695.68x = 153,996.32 × 91,478.08
  4. Step 4: Simplify right side
    111,695.68x = 14,087,287,680.67
  5. Step 5: Solve for x
    x = 14,087,287,680.67/111,695.68
  6. Step 6: Final answer
    x = 126,122.05

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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.