Home / 136,988.04-188,990.10-85,971

Finding the Fourth Proportional to 136,988.04, 188,990.10 and 85,971

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Solution

The fourth proportional to 136,988.04, 188,990.10 and 85,971 is: 118,606.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,988.04 : 188,990.10 = 85,971 : x
  2. Step 2: Convert to fraction form
    136,988.04/188,990.10 = 85,971/x
  3. Step 3: Cross multiply
    136,988.04x = 188,990.10 × 85,971
  4. Step 4: Simplify right side
    136,988.04x = 16,247,667,887.10
  5. Step 5: Solve for x
    x = 16,247,667,887.10/136,988.04
  6. Step 6: Final answer
    x = 118,606.47

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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.