Home / 91,121.51-136,683.47-31,958.90

Finding the Fourth Proportional to 91,121.51, 136,683.47 and 31,958.90

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Solution

The fourth proportional to 91,121.51, 136,683.47 and 31,958.90 is: 47,938.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,121.51 : 136,683.47 = 31,958.90 : x
  2. Step 2: Convert to fraction form
    91,121.51/136,683.47 = 31,958.90/x
  3. Step 3: Cross multiply
    91,121.51x = 136,683.47 × 31,958.90
  4. Step 4: Simplify right side
    91,121.51x = 4,368,252,506.17
  5. Step 5: Solve for x
    x = 4,368,252,506.17/91,121.51
  6. Step 6: Final answer
    x = 47,938.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.