Home / 217,407.51-326,113-89,290.78

Finding the Fourth Proportional to 217,407.51, 326,113 and 89,290.78

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Solution

The fourth proportional to 217,407.51, 326,113 and 89,290.78 is: 133,936.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,407.51 : 326,113 = 89,290.78 : x
  2. Step 2: Convert to fraction form
    217,407.51/326,113 = 89,290.78/x
  3. Step 3: Cross multiply
    217,407.51x = 326,113 × 89,290.78
  4. Step 4: Simplify right side
    217,407.51x = 29,118,884,138.14
  5. Step 5: Solve for x
    x = 29,118,884,138.14/217,407.51
  6. Step 6: Final answer
    x = 133,936.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.