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Finding the Fourth Proportional to 78,706.16, 108,613.08 and 42,895.92

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Solution

The fourth proportional to 78,706.16, 108,613.08 and 42,895.92 is: 59,195.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,706.16 : 108,613.08 = 42,895.92 : x
  2. Step 2: Convert to fraction form
    78,706.16/108,613.08 = 42,895.92/x
  3. Step 3: Cross multiply
    78,706.16x = 108,613.08 × 42,895.92
  4. Step 4: Simplify right side
    78,706.16x = 4,659,057,990.63
  5. Step 5: Solve for x
    x = 4,659,057,990.63/78,706.16
  6. Step 6: Final answer
    x = 59,195.60

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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.