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Finding the Fourth Proportional to 70,166.79, 105,276.38 and 42,106.97

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Solution

The fourth proportional to 70,166.79, 105,276.38 and 42,106.97 is: 63,176.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,166.79 : 105,276.38 = 42,106.97 : x
  2. Step 2: Convert to fraction form
    70,166.79/105,276.38 = 42,106.97/x
  3. Step 3: Cross multiply
    70,166.79x = 105,276.38 × 42,106.97
  4. Step 4: Simplify right side
    70,166.79x = 4,432,869,427.02
  5. Step 5: Solve for x
    x = 4,432,869,427.02/70,166.79
  6. Step 6: Final answer
    x = 63,176.18

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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.