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Finding the Fourth Proportional to 102,378.90, 153,896.40 and 73,000.20

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Solution

The fourth proportional to 102,378.90, 153,896.40 and 73,000.20 is: 109,734.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,378.90 : 153,896.40 = 73,000.20 : x
  2. Step 2: Convert to fraction form
    102,378.90/153,896.40 = 73,000.20/x
  3. Step 3: Cross multiply
    102,378.90x = 153,896.40 × 73,000.20
  4. Step 4: Simplify right side
    102,378.90x = 11,234,467,979.28
  5. Step 5: Solve for x
    x = 11,234,467,979.28/102,378.90
  6. Step 6: Final answer
    x = 109,734.21

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1.5x scale

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.