Home / 100,557.63-138,763.40-55,226.79

Finding the Fourth Proportional to 100,557.63, 138,763.40 and 55,226.79

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Solution

The fourth proportional to 100,557.63, 138,763.40 and 55,226.79 is: 76,209.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,557.63 : 138,763.40 = 55,226.79 : x
  2. Step 2: Convert to fraction form
    100,557.63/138,763.40 = 55,226.79/x
  3. Step 3: Cross multiply
    100,557.63x = 138,763.40 × 55,226.79
  4. Step 4: Simplify right side
    100,557.63x = 7,663,456,875.35
  5. Step 5: Solve for x
    x = 7,663,456,875.35/100,557.63
  6. Step 6: Final answer
    x = 76,209.60

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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.