Home / 100,737.32-139,017.81-55,418.75

Finding the Fourth Proportional to 100,737.32, 139,017.81 and 55,418.75

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Solution

The fourth proportional to 100,737.32, 139,017.81 and 55,418.75 is: 76,478.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,737.32 : 139,017.81 = 55,418.75 : x
  2. Step 2: Convert to fraction form
    100,737.32/139,017.81 = 55,418.75/x
  3. Step 3: Cross multiply
    100,737.32x = 139,017.81 × 55,418.75
  4. Step 4: Simplify right side
    100,737.32x = 7,704,193,291.99
  5. Step 5: Solve for x
    x = 7,704,193,291.99/100,737.32
  6. Step 6: Final answer
    x = 76,478.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.