Home / 100,000.19-138,001.75-67,744.69

Finding the Fourth Proportional to 100,000.19, 138,001.75 and 67,744.69

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Solution

The fourth proportional to 100,000.19, 138,001.75 and 67,744.69 is: 93,488.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,000.19 : 138,001.75 = 67,744.69 : x
  2. Step 2: Convert to fraction form
    100,000.19/138,001.75 = 67,744.69/x
  3. Step 3: Cross multiply
    100,000.19x = 138,001.75 × 67,744.69
  4. Step 4: Simplify right side
    100,000.19x = 9,348,885,258.84
  5. Step 5: Solve for x
    x = 9,348,885,258.84/100,000.19
  6. Step 6: Final answer
    x = 93,488.67

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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.