Home / 138,398.11-190,989.98-77,969.49

Finding the Fourth Proportional to 138,398.11, 190,989.98 and 77,969.49

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Solution

The fourth proportional to 138,398.11, 190,989.98 and 77,969.49 is: 107,598.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,398.11 : 190,989.98 = 77,969.49 : x
  2. Step 2: Convert to fraction form
    138,398.11/190,989.98 = 77,969.49/x
  3. Step 3: Cross multiply
    138,398.11x = 190,989.98 × 77,969.49
  4. Step 4: Simplify right side
    138,398.11x = 14,891,391,335.71
  5. Step 5: Solve for x
    x = 14,891,391,335.71/138,398.11
  6. Step 6: Final answer
    x = 107,598.23

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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.