Home / 210,239.79-315,401.25-77,121.30

Finding the Fourth Proportional to 210,239.79, 315,401.25 and 77,121.30

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Solution

The fourth proportional to 210,239.79, 315,401.25 and 77,121.30 is: 115,697.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,239.79 : 315,401.25 = 77,121.30 : x
  2. Step 2: Convert to fraction form
    210,239.79/315,401.25 = 77,121.30/x
  3. Step 3: Cross multiply
    210,239.79x = 315,401.25 × 77,121.30
  4. Step 4: Simplify right side
    210,239.79x = 24,324,154,421.63
  5. Step 5: Solve for x
    x = 24,324,154,421.63/210,239.79
  6. Step 6: Final answer
    x = 115,697.20

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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.