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Finding the Fourth Proportional to 70,541.60, 105,559.76 and 61,086.66

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Solution

The fourth proportional to 70,541.60, 105,559.76 and 61,086.66 is: 91,411.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,541.60 : 105,559.76 = 61,086.66 : x
  2. Step 2: Convert to fraction form
    70,541.60/105,559.76 = 61,086.66/x
  3. Step 3: Cross multiply
    70,541.60x = 105,559.76 × 61,086.66
  4. Step 4: Simplify right side
    70,541.60x = 6,448,293,168.80
  5. Step 5: Solve for x
    x = 6,448,293,168.80/70,541.60
  6. Step 6: Final answer
    x = 91,411.21

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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.