Home / 100,437.70-138,603.64-55,116.45

Finding the Fourth Proportional to 100,437.70, 138,603.64 and 55,116.45

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Solution

The fourth proportional to 100,437.70, 138,603.64 and 55,116.45 is: 76,060.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,437.70 : 138,603.64 = 55,116.45 : x
  2. Step 2: Convert to fraction form
    100,437.70/138,603.64 = 55,116.45/x
  3. Step 3: Cross multiply
    100,437.70x = 138,603.64 × 55,116.45
  4. Step 4: Simplify right side
    100,437.70x = 7,639,340,593.88
  5. Step 5: Solve for x
    x = 7,639,340,593.88/100,437.70
  6. Step 6: Final answer
    x = 76,060.49

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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.