Home / 107,121.28-147,810-66,828.64

Finding the Fourth Proportional to 107,121.28, 147,810 and 66,828.64

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Solution

The fourth proportional to 107,121.28, 147,810 and 66,828.64 is: 92,212.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,121.28 : 147,810 = 66,828.64 : x
  2. Step 2: Convert to fraction form
    107,121.28/147,810 = 66,828.64/x
  3. Step 3: Cross multiply
    107,121.28x = 147,810 × 66,828.64
  4. Step 4: Simplify right side
    107,121.28x = 9,877,941,278.40
  5. Step 5: Solve for x
    x = 9,877,941,278.40/107,121.28
  6. Step 6: Final answer
    x = 92,212.69

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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.