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Finding the Fourth Proportional to 70,601.04, 105,746.04 and 42,840.72

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Solution

The fourth proportional to 70,601.04, 105,746.04 and 42,840.72 is: 64,166.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,601.04 : 105,746.04 = 42,840.72 : x
  2. Step 2: Convert to fraction form
    70,601.04/105,746.04 = 42,840.72/x
  3. Step 3: Cross multiply
    70,601.04x = 105,746.04 × 42,840.72
  4. Step 4: Simplify right side
    70,601.04x = 4,530,236,490.75
  5. Step 5: Solve for x
    x = 4,530,236,490.75/70,601.04
  6. Step 6: Final answer
    x = 64,166.71

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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.