Home / 140,820.16-210,958.05-78,301.12

Finding the Fourth Proportional to 140,820.16, 210,958.05 and 78,301.12

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Solution

The fourth proportional to 140,820.16, 210,958.05 and 78,301.12 is: 117,300.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,820.16 : 210,958.05 = 78,301.12 : x
  2. Step 2: Convert to fraction form
    140,820.16/210,958.05 = 78,301.12/x
  3. Step 3: Cross multiply
    140,820.16x = 210,958.05 × 78,301.12
  4. Step 4: Simplify right side
    140,820.16x = 16,518,251,588.02
  5. Step 5: Solve for x
    x = 16,518,251,588.02/140,820.16
  6. Step 6: Final answer
    x = 117,300.33

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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.