Home / 210,189.40-315,284.10-77,078.68

Finding the Fourth Proportional to 210,189.40, 315,284.10 and 77,078.68

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Solution

The fourth proportional to 210,189.40, 315,284.10 and 77,078.68 is: 115,618.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,189.40 : 315,284.10 = 77,078.68 : x
  2. Step 2: Convert to fraction form
    210,189.40/315,284.10 = 77,078.68/x
  3. Step 3: Cross multiply
    210,189.40x = 315,284.10 × 77,078.68
  4. Step 4: Simplify right side
    210,189.40x = 24,301,682,252.99
  5. Step 5: Solve for x
    x = 24,301,682,252.99/210,189.40
  6. Step 6: Final answer
    x = 115,618.02

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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.