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Finding the Fourth Proportional to 126,368.72, 174,418.74 and 72,684.75

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Solution

The fourth proportional to 126,368.72, 174,418.74 and 72,684.75 is: 100,322.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,368.72 : 174,418.74 = 72,684.75 : x
  2. Step 2: Convert to fraction form
    126,368.72/174,418.74 = 72,684.75/x
  3. Step 3: Cross multiply
    126,368.72x = 174,418.74 × 72,684.75
  4. Step 4: Simplify right side
    126,368.72x = 12,677,582,512.22
  5. Step 5: Solve for x
    x = 12,677,582,512.22/126,368.72
  6. Step 6: Final answer
    x = 100,322.16

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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.