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Finding the Fourth Proportional to 140,100.10, 210,150.15 and 123,478.90

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Solution

The fourth proportional to 140,100.10, 210,150.15 and 123,478.90 is: 185,218.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,100.10 : 210,150.15 = 123,478.90 : x
  2. Step 2: Convert to fraction form
    140,100.10/210,150.15 = 123,478.90/x
  3. Step 3: Cross multiply
    140,100.10x = 210,150.15 × 123,478.90
  4. Step 4: Simplify right side
    140,100.10x = 25,949,109,356.84
  5. Step 5: Solve for x
    x = 25,949,109,356.84/140,100.10
  6. Step 6: Final answer
    x = 185,218.35

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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.