Home / 135,557.08-187,065.58-78,964.80

Finding the Fourth Proportional to 135,557.08, 187,065.58 and 78,964.80

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Solution

The fourth proportional to 135,557.08, 187,065.58 and 78,964.80 is: 108,969.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,557.08 : 187,065.58 = 78,964.80 : x
  2. Step 2: Convert to fraction form
    135,557.08/187,065.58 = 78,964.80/x
  3. Step 3: Cross multiply
    135,557.08x = 187,065.58 × 78,964.80
  4. Step 4: Simplify right side
    135,557.08x = 14,771,596,111.58
  5. Step 5: Solve for x
    x = 14,771,596,111.58/135,557.08
  6. Step 6: Final answer
    x = 108,969.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.