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Finding the Fourth Proportional to 80,603.20, 120,904.64 and 21,438.93

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Solution

The fourth proportional to 80,603.20, 120,904.64 and 21,438.93 is: 32,158.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,603.20 : 120,904.64 = 21,438.93 : x
  2. Step 2: Convert to fraction form
    80,603.20/120,904.64 = 21,438.93/x
  3. Step 3: Cross multiply
    80,603.20x = 120,904.64 × 21,438.93
  4. Step 4: Simplify right side
    80,603.20x = 2,592,066,113.64
  5. Step 5: Solve for x
    x = 2,592,066,113.64/80,603.20
  6. Step 6: Final answer
    x = 32,158.35

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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.