Home / 128,071.41-176,722.25-71,485.17

Finding the Fourth Proportional to 128,071.41, 176,722.25 and 71,485.17

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Solution

The fourth proportional to 128,071.41, 176,722.25 and 71,485.17 is: 98,640.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,071.41 : 176,722.25 = 71,485.17 : x
  2. Step 2: Convert to fraction form
    128,071.41/176,722.25 = 71,485.17/x
  3. Step 3: Cross multiply
    128,071.41x = 176,722.25 × 71,485.17
  4. Step 4: Simplify right side
    128,071.41x = 12,633,019,726.61
  5. Step 5: Solve for x
    x = 12,633,019,726.61/128,071.41
  6. Step 6: Final answer
    x = 98,640.44

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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.