Home / 138,071.04-190,588.88-121,254.38

Finding the Fourth Proportional to 138,071.04, 190,588.88 and 121,254.38

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Solution

The fourth proportional to 138,071.04, 190,588.88 and 121,254.38 is: 167,375.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,071.04 : 190,588.88 = 121,254.38 : x
  2. Step 2: Convert to fraction form
    138,071.04/190,588.88 = 121,254.38/x
  3. Step 3: Cross multiply
    138,071.04x = 190,588.88 × 121,254.38
  4. Step 4: Simplify right side
    138,071.04x = 23,109,736,479.29
  5. Step 5: Solve for x
    x = 23,109,736,479.29/138,071.04
  6. Step 6: Final answer
    x = 167,375.70

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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.