Home / 138,987.18-191,802.60-82,402.20

Finding the Fourth Proportional to 138,987.18, 191,802.60 and 82,402.20

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Solution

The fourth proportional to 138,987.18, 191,802.60 and 82,402.20 is: 113,715.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,987.18 : 191,802.60 = 82,402.20 : x
  2. Step 2: Convert to fraction form
    138,987.18/191,802.60 = 82,402.20/x
  3. Step 3: Cross multiply
    138,987.18x = 191,802.60 × 82,402.20
  4. Step 4: Simplify right side
    138,987.18x = 15,804,956,205.72
  5. Step 5: Solve for x
    x = 15,804,956,205.72/138,987.18
  6. Step 6: Final answer
    x = 113,715.21

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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.