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Finding the Fourth Proportional to 109,420.80, 150,998.40 and 64,125.60

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Solution

The fourth proportional to 109,420.80, 150,998.40 and 64,125.60 is: 88,491.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,420.80 : 150,998.40 = 64,125.60 : x
  2. Step 2: Convert to fraction form
    109,420.80/150,998.40 = 64,125.60/x
  3. Step 3: Cross multiply
    109,420.80x = 150,998.40 × 64,125.60
  4. Step 4: Simplify right side
    109,420.80x = 9,682,862,999.04
  5. Step 5: Solve for x
    x = 9,682,862,999.04/109,420.80
  6. Step 6: Final answer
    x = 88,491.98

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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.