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Finding the Fourth Proportional to 210,009.36, 315,019.80 and 67,860.72

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Solution

The fourth proportional to 210,009.36, 315,019.80 and 67,860.72 is: 101,792.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,009.36 : 315,019.80 = 67,860.72 : x
  2. Step 2: Convert to fraction form
    210,009.36/315,019.80 = 67,860.72/x
  3. Step 3: Cross multiply
    210,009.36x = 315,019.80 × 67,860.72
  4. Step 4: Simplify right side
    210,009.36x = 21,377,470,442.26
  5. Step 5: Solve for x
    x = 21,377,470,442.26/210,009.36
  6. Step 6: Final answer
    x = 101,792.94

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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.