Home / 100,864.40-139,191.72-55,541.45

Finding the Fourth Proportional to 100,864.40, 139,191.72 and 55,541.45

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Solution

The fourth proportional to 100,864.40, 139,191.72 and 55,541.45 is: 76,646.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,864.40 : 139,191.72 = 55,541.45 : x
  2. Step 2: Convert to fraction form
    100,864.40/139,191.72 = 55,541.45/x
  3. Step 3: Cross multiply
    100,864.40x = 139,191.72 × 55,541.45
  4. Step 4: Simplify right side
    100,864.40x = 7,730,909,260.84
  5. Step 5: Solve for x
    x = 7,730,909,260.84/100,864.40
  6. Step 6: Final answer
    x = 76,646.56

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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.