Home / 138,239.28-190,881-89,865.18

Finding the Fourth Proportional to 138,239.28, 190,881 and 89,865.18

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Solution

The fourth proportional to 138,239.28, 190,881 and 89,865.18 is: 124,085.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,239.28 : 190,881 = 89,865.18 : x
  2. Step 2: Convert to fraction form
    138,239.28/190,881 = 89,865.18/x
  3. Step 3: Cross multiply
    138,239.28x = 190,881 × 89,865.18
  4. Step 4: Simplify right side
    138,239.28x = 17,153,555,423.58
  5. Step 5: Solve for x
    x = 17,153,555,423.58/138,239.28
  6. Step 6: Final answer
    x = 124,085.97

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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.