Home / 100,909.26-139,255.74-55,587.45

Finding the Fourth Proportional to 100,909.26, 139,255.74 and 55,587.45

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Solution

The fourth proportional to 100,909.26, 139,255.74 and 55,587.45 is: 76,711.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,909.26 : 139,255.74 = 55,587.45 : x
  2. Step 2: Convert to fraction form
    100,909.26/139,255.74 = 55,587.45/x
  3. Step 3: Cross multiply
    100,909.26x = 139,255.74 × 55,587.45
  4. Step 4: Simplify right side
    100,909.26x = 7,740,871,484.46
  5. Step 5: Solve for x
    x = 7,740,871,484.46/100,909.26
  6. Step 6: Final answer
    x = 76,711.21

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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.