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Finding the Fourth Proportional to 210,018.60, 315,088.92 and 67,860.90

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Solution

The fourth proportional to 210,018.60, 315,088.92 and 67,860.90 is: 101,811.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,018.60 : 315,088.92 = 67,860.90 : x
  2. Step 2: Convert to fraction form
    210,018.60/315,088.92 = 67,860.90/x
  3. Step 3: Cross multiply
    210,018.60x = 315,088.92 × 67,860.90
  4. Step 4: Simplify right side
    210,018.60x = 21,382,217,691.23
  5. Step 5: Solve for x
    x = 21,382,217,691.23/210,018.60
  6. Step 6: Final answer
    x = 101,811.07

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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.