Home / 100,220.02-138,303.50-54,900.78

Finding the Fourth Proportional to 100,220.02, 138,303.50 and 54,900.78

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Solution

The fourth proportional to 100,220.02, 138,303.50 and 54,900.78 is: 75,763.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,220.02 : 138,303.50 = 54,900.78 : x
  2. Step 2: Convert to fraction form
    100,220.02/138,303.50 = 54,900.78/x
  3. Step 3: Cross multiply
    100,220.02x = 138,303.50 × 54,900.78
  4. Step 4: Simplify right side
    100,220.02x = 7,592,970,026.73
  5. Step 5: Solve for x
    x = 7,592,970,026.73/100,220.02
  6. Step 6: Final answer
    x = 75,763.01

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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.