Home / 100,784.28-139,088.06-57,770.94

Finding the Fourth Proportional to 100,784.28, 139,088.06 and 57,770.94

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Solution

The fourth proportional to 100,784.28, 139,088.06 and 57,770.94 is: 79,727.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,784.28 : 139,088.06 = 57,770.94 : x
  2. Step 2: Convert to fraction form
    100,784.28/139,088.06 = 57,770.94/x
  3. Step 3: Cross multiply
    100,784.28x = 139,088.06 × 57,770.94
  4. Step 4: Simplify right side
    100,784.28x = 8,035,247,968.98
  5. Step 5: Solve for x
    x = 8,035,247,968.98/100,784.28
  6. Step 6: Final answer
    x = 79,727.20

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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.