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Finding the Fourth Proportional to 140,209.92, 210,139.92 and 70,109.28

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Solution

The fourth proportional to 140,209.92, 210,139.92 and 70,109.28 is: 105,076.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,209.92 : 210,139.92 = 70,109.28 : x
  2. Step 2: Convert to fraction form
    140,209.92/210,139.92 = 70,109.28/x
  3. Step 3: Cross multiply
    140,209.92x = 210,139.92 × 70,109.28
  4. Step 4: Simplify right side
    140,209.92x = 14,732,758,490.46
  5. Step 5: Solve for x
    x = 14,732,758,490.46/140,209.92
  6. Step 6: Final answer
    x = 105,076.43

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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.