Home / 52,104.11-78,155.99-12,661.21

Finding the Fourth Proportional to 52,104.11, 78,155.99 and 12,661.21

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Solution

The fourth proportional to 52,104.11, 78,155.99 and 12,661.21 is: 18,991.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,104.11 : 78,155.99 = 12,661.21 : x
  2. Step 2: Convert to fraction form
    52,104.11/78,155.99 = 12,661.21/x
  3. Step 3: Cross multiply
    52,104.11x = 78,155.99 × 12,661.21
  4. Step 4: Simplify right side
    52,104.11x = 989,549,484.02
  5. Step 5: Solve for x
    x = 989,549,484.02/52,104.11
  6. Step 6: Final answer
    x = 18,991.77

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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.