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Finding the Fourth Proportional to 100,737.48, 139,014.88 and 55,415.44

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Solution

The fourth proportional to 100,737.48, 139,014.88 and 55,415.44 is: 76,471.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,737.48 : 139,014.88 = 55,415.44 : x
  2. Step 2: Convert to fraction form
    100,737.48/139,014.88 = 55,415.44/x
  3. Step 3: Cross multiply
    100,737.48x = 139,014.88 × 55,415.44
  4. Step 4: Simplify right side
    100,737.48x = 7,703,570,741.75
  5. Step 5: Solve for x
    x = 7,703,570,741.75/100,737.48
  6. Step 6: Final answer
    x = 76,471.74

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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.