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Finding the Fourth Proportional to 102,987.40, 154,578.30 and 63,621.40

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Solution

The fourth proportional to 102,987.40, 154,578.30 and 63,621.40 is: 95,492.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,987.40 : 154,578.30 = 63,621.40 : x
  2. Step 2: Convert to fraction form
    102,987.40/154,578.30 = 63,621.40/x
  3. Step 3: Cross multiply
    102,987.40x = 154,578.30 × 63,621.40
  4. Step 4: Simplify right side
    102,987.40x = 9,834,487,855.62
  5. Step 5: Solve for x
    x = 9,834,487,855.62/102,987.40
  6. Step 6: Final answer
    x = 95,492.15

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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.