Home / 100,030.83-138,040.65-54,706.47

Finding the Fourth Proportional to 100,030.83, 138,040.65 and 54,706.47

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Solution

The fourth proportional to 100,030.83, 138,040.65 and 54,706.47 is: 75,493.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,030.83 : 138,040.65 = 54,706.47 : x
  2. Step 2: Convert to fraction form
    100,030.83/138,040.65 = 54,706.47/x
  3. Step 3: Cross multiply
    100,030.83x = 138,040.65 × 54,706.47
  4. Step 4: Simplify right side
    100,030.83x = 7,551,716,678.01
  5. Step 5: Solve for x
    x = 7,551,716,678.01/100,030.83
  6. Step 6: Final answer
    x = 75,493.89

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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.