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Finding the Fourth Proportional to 115,870.40, 173,805.60 and 36,987.20

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Solution

The fourth proportional to 115,870.40, 173,805.60 and 36,987.20 is: 55,480.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,870.40 : 173,805.60 = 36,987.20 : x
  2. Step 2: Convert to fraction form
    115,870.40/173,805.60 = 36,987.20/x
  3. Step 3: Cross multiply
    115,870.40x = 173,805.60 × 36,987.20
  4. Step 4: Simplify right side
    115,870.40x = 6,428,582,488.32
  5. Step 5: Solve for x
    x = 6,428,582,488.32/115,870.40
  6. Step 6: Final answer
    x = 55,480.80

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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.