Home / 129,427.56-178,615.78-72,842.60

Finding the Fourth Proportional to 129,427.56, 178,615.78 and 72,842.60

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Solution

The fourth proportional to 129,427.56, 178,615.78 and 72,842.60 is: 100,526.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,427.56 : 178,615.78 = 72,842.60 : x
  2. Step 2: Convert to fraction form
    129,427.56/178,615.78 = 72,842.60/x
  3. Step 3: Cross multiply
    129,427.56x = 178,615.78 × 72,842.60
  4. Step 4: Simplify right side
    129,427.56x = 13,010,837,816.23
  5. Step 5: Solve for x
    x = 13,010,837,816.23/129,427.56
  6. Step 6: Final answer
    x = 100,526.02

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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.