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Finding the Fourth Proportional to 111,598.32, 153,988.38 and 71,347.80

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Solution

The fourth proportional to 111,598.32, 153,988.38 and 71,347.80 is: 98,448.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,598.32 : 153,988.38 = 71,347.80 : x
  2. Step 2: Convert to fraction form
    111,598.32/153,988.38 = 71,347.80/x
  3. Step 3: Cross multiply
    111,598.32x = 153,988.38 × 71,347.80
  4. Step 4: Simplify right side
    111,598.32x = 10,986,732,138.56
  5. Step 5: Solve for x
    x = 10,986,732,138.56/111,598.32
  6. Step 6: Final answer
    x = 98,448.90

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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.