Home / 138,398.64-190,940.76-81,770.16

Finding the Fourth Proportional to 138,398.64, 190,940.76 and 81,770.16

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Solution

The fourth proportional to 138,398.64, 190,940.76 and 81,770.16 is: 112,813.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,398.64 : 190,940.76 = 81,770.16 : x
  2. Step 2: Convert to fraction form
    138,398.64/190,940.76 = 81,770.16/x
  3. Step 3: Cross multiply
    138,398.64x = 190,940.76 × 81,770.16
  4. Step 4: Simplify right side
    138,398.64x = 15,613,256,495.72
  5. Step 5: Solve for x
    x = 15,613,256,495.72/138,398.64
  6. Step 6: Final answer
    x = 112,813.66

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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.