Home / 80,901.58-121,407.02-28,311.52

Finding the Fourth Proportional to 80,901.58, 121,407.02 and 28,311.52

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Solution

The fourth proportional to 80,901.58, 121,407.02 and 28,311.52 is: 42,486.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,901.58 : 121,407.02 = 28,311.52 : x
  2. Step 2: Convert to fraction form
    80,901.58/121,407.02 = 28,311.52/x
  3. Step 3: Cross multiply
    80,901.58x = 121,407.02 × 28,311.52
  4. Step 4: Simplify right side
    80,901.58x = 3,437,217,274.87
  5. Step 5: Solve for x
    x = 3,437,217,274.87/80,901.58
  6. Step 6: Final answer
    x = 42,486.40

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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.