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Finding the Fourth Proportional to 70,385.40, 105,594.63 and 20,466.57

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Solution

The fourth proportional to 70,385.40, 105,594.63 and 20,466.57 is: 30,704.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,385.40 : 105,594.63 = 20,466.57 : x
  2. Step 2: Convert to fraction form
    70,385.40/105,594.63 = 20,466.57/x
  3. Step 3: Cross multiply
    70,385.40x = 105,594.63 × 20,466.57
  4. Step 4: Simplify right side
    70,385.40x = 2,161,159,886.52
  5. Step 5: Solve for x
    x = 2,161,159,886.52/70,385.40
  6. Step 6: Final answer
    x = 30,704.66

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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.