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Finding the Fourth Proportional to 67,639.70, 101,472.30 and 20,881.64

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Solution

The fourth proportional to 67,639.70, 101,472.30 and 20,881.64 is: 31,326.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,639.70 : 101,472.30 = 20,881.64 : x
  2. Step 2: Convert to fraction form
    67,639.70/101,472.30 = 20,881.64/x
  3. Step 3: Cross multiply
    67,639.70x = 101,472.30 × 20,881.64
  4. Step 4: Simplify right side
    67,639.70x = 2,118,908,038.57
  5. Step 5: Solve for x
    x = 2,118,908,038.57/67,639.70
  6. Step 6: Final answer
    x = 31,326.40

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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.