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Finding the Fourth Proportional to 107,865.80, 161,798.70 and 103,315.40

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Solution

The fourth proportional to 107,865.80, 161,798.70 and 103,315.40 is: 154,973.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,865.80 : 161,798.70 = 103,315.40 : x
  2. Step 2: Convert to fraction form
    107,865.80/161,798.70 = 103,315.40/x
  3. Step 3: Cross multiply
    107,865.80x = 161,798.70 × 103,315.40
  4. Step 4: Simplify right side
    107,865.80x = 16,716,297,409.98
  5. Step 5: Solve for x
    x = 16,716,297,409.98/107,865.80
  6. Step 6: Final answer
    x = 154,973.10

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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.