Home / 81,168.13-121,795.80-39,615.13

Finding the Fourth Proportional to 81,168.13, 121,795.80 and 39,615.13

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Solution

The fourth proportional to 81,168.13, 121,795.80 and 39,615.13 is: 59,443.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,168.13 : 121,795.80 = 39,615.13 : x
  2. Step 2: Convert to fraction form
    81,168.13/121,795.80 = 39,615.13/x
  3. Step 3: Cross multiply
    81,168.13x = 121,795.80 × 39,615.13
  4. Step 4: Simplify right side
    81,168.13x = 4,824,956,450.45
  5. Step 5: Solve for x
    x = 4,824,956,450.45/81,168.13
  6. Step 6: Final answer
    x = 59,443.98

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1.5x scale

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.