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Finding the Fourth Proportional to 140,004.70, 210,007.05 and 86,739.10

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Solution

The fourth proportional to 140,004.70, 210,007.05 and 86,739.10 is: 130,108.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,004.70 : 210,007.05 = 86,739.10 : x
  2. Step 2: Convert to fraction form
    140,004.70/210,007.05 = 86,739.10/x
  3. Step 3: Cross multiply
    140,004.70x = 210,007.05 × 86,739.10
  4. Step 4: Simplify right side
    140,004.70x = 18,215,822,510.66
  5. Step 5: Solve for x
    x = 18,215,822,510.66/140,004.70
  6. Step 6: Final answer
    x = 130,108.65

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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.