Home / 91,325.40-136,988.35-28,143.48

Finding the Fourth Proportional to 91,325.40, 136,988.35 and 28,143.48

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Solution

The fourth proportional to 91,325.40, 136,988.35 and 28,143.48 is: 42,215.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,325.40 : 136,988.35 = 28,143.48 : x
  2. Step 2: Convert to fraction form
    91,325.40/136,988.35 = 28,143.48/x
  3. Step 3: Cross multiply
    91,325.40x = 136,988.35 × 28,143.48
  4. Step 4: Simplify right side
    91,325.40x = 3,855,328,304.39
  5. Step 5: Solve for x
    x = 3,855,328,304.39/91,325.40
  6. Step 6: Final answer
    x = 42,215.29

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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.