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Finding the Fourth Proportional to 78,955.28, 108,925.44 and 51,723.60

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Solution

The fourth proportional to 78,955.28, 108,925.44 and 51,723.60 is: 71,357.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,955.28 : 108,925.44 = 51,723.60 : x
  2. Step 2: Convert to fraction form
    78,955.28/108,925.44 = 51,723.60/x
  3. Step 3: Cross multiply
    78,955.28x = 108,925.44 × 51,723.60
  4. Step 4: Simplify right side
    78,955.28x = 5,634,015,888.38
  5. Step 5: Solve for x
    x = 5,634,015,888.38/78,955.28
  6. Step 6: Final answer
    x = 71,357.05

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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.