Home / 210,240.79-315,402.75-77,122.30

Finding the Fourth Proportional to 210,240.79, 315,402.75 and 77,122.30

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Solution

The fourth proportional to 210,240.79, 315,402.75 and 77,122.30 is: 115,698.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,240.79 : 315,402.75 = 77,122.30 : x
  2. Step 2: Convert to fraction form
    210,240.79/315,402.75 = 77,122.30/x
  3. Step 3: Cross multiply
    210,240.79x = 315,402.75 × 77,122.30
  4. Step 4: Simplify right side
    210,240.79x = 24,324,585,506.33
  5. Step 5: Solve for x
    x = 24,324,585,506.33/210,240.79
  6. Step 6: Final answer
    x = 115,698.70

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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.