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Finding the Fourth Proportional to 137,970.84, 190,400.52 and 80,613.53

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Solution

The fourth proportional to 137,970.84, 190,400.52 and 80,613.53 is: 111,247.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,970.84 : 190,400.52 = 80,613.53 : x
  2. Step 2: Convert to fraction form
    137,970.84/190,400.52 = 80,613.53/x
  3. Step 3: Cross multiply
    137,970.84x = 190,400.52 × 80,613.53
  4. Step 4: Simplify right side
    137,970.84x = 15,348,858,031.04
  5. Step 5: Solve for x
    x = 15,348,858,031.04/137,970.84
  6. Step 6: Final answer
    x = 111,247.12

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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.