Home / 128,669.66-177,616.23-83,386.52

Finding the Fourth Proportional to 128,669.66, 177,616.23 and 83,386.52

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Solution

The fourth proportional to 128,669.66, 177,616.23 and 83,386.52 is: 115,107.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,669.66 : 177,616.23 = 83,386.52 : x
  2. Step 2: Convert to fraction form
    128,669.66/177,616.23 = 83,386.52/x
  3. Step 3: Cross multiply
    128,669.66x = 177,616.23 × 83,386.52
  4. Step 4: Simplify right side
    128,669.66x = 14,810,799,315.22
  5. Step 5: Solve for x
    x = 14,810,799,315.22/128,669.66
  6. Step 6: Final answer
    x = 115,107.16

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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.