Home / 100,437.45-138,603.30-55,116.19

Finding the Fourth Proportional to 100,437.45, 138,603.30 and 55,116.19

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Solution

The fourth proportional to 100,437.45, 138,603.30 and 55,116.19 is: 76,060.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,437.45 : 138,603.30 = 55,116.19 : x
  2. Step 2: Convert to fraction form
    100,437.45/138,603.30 = 55,116.19/x
  3. Step 3: Cross multiply
    100,437.45x = 138,603.30 × 55,116.19
  4. Step 4: Simplify right side
    100,437.45x = 7,639,285,541.85
  5. Step 5: Solve for x
    x = 7,639,285,541.85/100,437.45
  6. Step 6: Final answer
    x = 76,060.13

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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.