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Finding the Fourth Proportional to 140,003.90, 210,005.85 and 100,637.90

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Solution

The fourth proportional to 140,003.90, 210,005.85 and 100,637.90 is: 150,956.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,003.90 : 210,005.85 = 100,637.90 : x
  2. Step 2: Convert to fraction form
    140,003.90/210,005.85 = 100,637.90/x
  3. Step 3: Cross multiply
    140,003.90x = 210,005.85 × 100,637.90
  4. Step 4: Simplify right side
    140,003.90x = 21,134,547,731.72
  5. Step 5: Solve for x
    x = 21,134,547,731.72/140,003.90
  6. Step 6: Final answer
    x = 150,956.85

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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.