Home / 138,526.28-190,678.18-100,223.70

Finding the Fourth Proportional to 138,526.28, 190,678.18 and 100,223.70

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Solution

The fourth proportional to 138,526.28, 190,678.18 and 100,223.70 is: 137,955.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,526.28 : 190,678.18 = 100,223.70 : x
  2. Step 2: Convert to fraction form
    138,526.28/190,678.18 = 100,223.70/x
  3. Step 3: Cross multiply
    138,526.28x = 190,678.18 × 100,223.70
  4. Step 4: Simplify right side
    138,526.28x = 19,110,472,708.87
  5. Step 5: Solve for x
    x = 19,110,472,708.87/138,526.28
  6. Step 6: Final answer
    x = 137,955.58

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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.