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Finding the Fourth Proportional to 80,603.20, 120,904.80 and 79,566.40

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Solution

The fourth proportional to 80,603.20, 120,904.80 and 79,566.40 is: 119,349.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,603.20 : 120,904.80 = 79,566.40 : x
  2. Step 2: Convert to fraction form
    80,603.20/120,904.80 = 79,566.40/x
  3. Step 3: Cross multiply
    80,603.20x = 120,904.80 × 79,566.40
  4. Step 4: Simplify right side
    80,603.20x = 9,619,959,678.72
  5. Step 5: Solve for x
    x = 9,619,959,678.72/80,603.20
  6. Step 6: Final answer
    x = 119,349.60

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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.