Home / 84,386.09-126,575.76-21,206.72

Finding the Fourth Proportional to 84,386.09, 126,575.76 and 21,206.72

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Solution

The fourth proportional to 84,386.09, 126,575.76 and 21,206.72 is: 31,809.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,386.09 : 126,575.76 = 21,206.72 : x
  2. Step 2: Convert to fraction form
    84,386.09/126,575.76 = 21,206.72/x
  3. Step 3: Cross multiply
    84,386.09x = 126,575.76 × 21,206.72
  4. Step 4: Simplify right side
    84,386.09x = 2,684,256,701.11
  5. Step 5: Solve for x
    x = 2,684,256,701.11/84,386.09
  6. Step 6: Final answer
    x = 31,809.23

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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.