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Finding the Fourth Proportional to 70,555.40, 105,862.72 and 43,923.66

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Solution

The fourth proportional to 70,555.40, 105,862.72 and 43,923.66 is: 65,903.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,555.40 : 105,862.72 = 43,923.66 : x
  2. Step 2: Convert to fraction form
    70,555.40/105,862.72 = 43,923.66/x
  3. Step 3: Cross multiply
    70,555.40x = 105,862.72 × 43,923.66
  4. Step 4: Simplify right side
    70,555.40x = 4,649,877,900.34
  5. Step 5: Solve for x
    x = 4,649,877,900.34/70,555.40
  6. Step 6: Final answer
    x = 65,903.93

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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.