Home / 100,223.39-138,222.45-71,488.31

Finding the Fourth Proportional to 100,223.39, 138,222.45 and 71,488.31

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Solution

The fourth proportional to 100,223.39, 138,222.45 and 71,488.31 is: 98,592.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,223.39 : 138,222.45 = 71,488.31 : x
  2. Step 2: Convert to fraction form
    100,223.39/138,222.45 = 71,488.31/x
  3. Step 3: Cross multiply
    100,223.39x = 138,222.45 × 71,488.31
  4. Step 4: Simplify right side
    100,223.39x = 9,881,288,663.45
  5. Step 5: Solve for x
    x = 9,881,288,663.45/100,223.39
  6. Step 6: Final answer
    x = 98,592.64

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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.