Home / 103,886.20-155,829.30-91,055.80

Finding the Fourth Proportional to 103,886.20, 155,829.30 and 91,055.80

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Solution

The fourth proportional to 103,886.20, 155,829.30 and 91,055.80 is: 136,583.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,886.20 : 155,829.30 = 91,055.80 : x
  2. Step 2: Convert to fraction form
    103,886.20/155,829.30 = 91,055.80/x
  3. Step 3: Cross multiply
    103,886.20x = 155,829.30 × 91,055.80
  4. Step 4: Simplify right side
    103,886.20x = 14,189,161,574.94
  5. Step 5: Solve for x
    x = 14,189,161,574.94/103,886.20
  6. Step 6: Final answer
    x = 136,583.70

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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.