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Finding the Fourth Proportional to 78,718.08, 108,629.84 and 42,908.22

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Solution

The fourth proportional to 78,718.08, 108,629.84 and 42,908.22 is: 59,212.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,718.08 : 108,629.84 = 42,908.22 : x
  2. Step 2: Convert to fraction form
    78,718.08/108,629.84 = 42,908.22/x
  3. Step 3: Cross multiply
    78,718.08x = 108,629.84 × 42,908.22
  4. Step 4: Simplify right side
    78,718.08x = 4,661,113,073.28
  5. Step 5: Solve for x
    x = 4,661,113,073.28/78,718.08
  6. Step 6: Final answer
    x = 59,212.74

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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.