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Finding the Fourth Proportional to 115,264.40, 172,920.90 and 36,386.60

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Solution

The fourth proportional to 115,264.40, 172,920.90 and 36,386.60 is: 54,587.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,264.40 : 172,920.90 = 36,386.60 : x
  2. Step 2: Convert to fraction form
    115,264.40/172,920.90 = 36,386.60/x
  3. Step 3: Cross multiply
    115,264.40x = 172,920.90 × 36,386.60
  4. Step 4: Simplify right side
    115,264.40x = 6,292,003,619.94
  5. Step 5: Solve for x
    x = 6,292,003,619.94/115,264.40
  6. Step 6: Final answer
    x = 54,587.57

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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.