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Finding the Fourth Proportional to 80,798.40, 121,111.20 and 36,417.60

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Solution

The fourth proportional to 80,798.40, 121,111.20 and 36,417.60 is: 54,587.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,798.40 : 121,111.20 = 36,417.60 : x
  2. Step 2: Convert to fraction form
    80,798.40/121,111.20 = 36,417.60/x
  3. Step 3: Cross multiply
    80,798.40x = 121,111.20 × 36,417.60
  4. Step 4: Simplify right side
    80,798.40x = 4,410,579,237.12
  5. Step 5: Solve for x
    x = 4,410,579,237.12/80,798.40
  6. Step 6: Final answer
    x = 54,587.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.