Home / 138,118.05-190,599.75-84,402.90

Finding the Fourth Proportional to 138,118.05, 190,599.75 and 84,402.90

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Solution

The fourth proportional to 138,118.05, 190,599.75 and 84,402.90 is: 116,474.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,118.05 : 190,599.75 = 84,402.90 : x
  2. Step 2: Convert to fraction form
    138,118.05/190,599.75 = 84,402.90/x
  3. Step 3: Cross multiply
    138,118.05x = 190,599.75 × 84,402.90
  4. Step 4: Simplify right side
    138,118.05x = 16,087,171,639.28
  5. Step 5: Solve for x
    x = 16,087,171,639.28/138,118.05
  6. Step 6: Final answer
    x = 116,474.07

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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.