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Finding the Fourth Proportional to 111,478.66, 153,830.37 and 66,148.84

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Solution

The fourth proportional to 111,478.66, 153,830.37 and 66,148.84 is: 91,279.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,478.66 : 153,830.37 = 66,148.84 : x
  2. Step 2: Convert to fraction form
    111,478.66/153,830.37 = 66,148.84/x
  3. Step 3: Cross multiply
    111,478.66x = 153,830.37 × 66,148.84
  4. Step 4: Simplify right side
    111,478.66x = 10,175,700,532.27
  5. Step 5: Solve for x
    x = 10,175,700,532.27/111,478.66
  6. Step 6: Final answer
    x = 91,279.36

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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.