Home / 112,540.51-155,042.40-78,487.17

Finding the Fourth Proportional to 112,540.51, 155,042.40 and 78,487.17

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Solution

The fourth proportional to 112,540.51, 155,042.40 and 78,487.17 is: 108,128.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,540.51 : 155,042.40 = 78,487.17 : x
  2. Step 2: Convert to fraction form
    112,540.51/155,042.40 = 78,487.17/x
  3. Step 3: Cross multiply
    112,540.51x = 155,042.40 × 78,487.17
  4. Step 4: Simplify right side
    112,540.51x = 12,168,839,206.01
  5. Step 5: Solve for x
    x = 12,168,839,206.01/112,540.51
  6. Step 6: Final answer
    x = 108,128.52

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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.