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Finding the Fourth Proportional to 115,987.50, 173,981.25 and 28,435.50

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Solution

The fourth proportional to 115,987.50, 173,981.25 and 28,435.50 is: 42,653.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,987.50 : 173,981.25 = 28,435.50 : x
  2. Step 2: Convert to fraction form
    115,987.50/173,981.25 = 28,435.50/x
  3. Step 3: Cross multiply
    115,987.50x = 173,981.25 × 28,435.50
  4. Step 4: Simplify right side
    115,987.50x = 4,947,243,834.38
  5. Step 5: Solve for x
    x = 4,947,243,834.38/115,987.50
  6. Step 6: Final answer
    x = 42,653.25

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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.