Home / 90,538.20-135,271.35-87,437.52

Finding the Fourth Proportional to 90,538.20, 135,271.35 and 87,437.52

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Solution

The fourth proportional to 90,538.20, 135,271.35 and 87,437.52 is: 130,638.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,538.20 : 135,271.35 = 87,437.52 : x
  2. Step 2: Convert to fraction form
    90,538.20/135,271.35 = 87,437.52/x
  3. Step 3: Cross multiply
    90,538.20x = 135,271.35 × 87,437.52
  4. Step 4: Simplify right side
    90,538.20x = 11,827,791,371.05
  5. Step 5: Solve for x
    x = 11,827,791,371.05/90,538.20
  6. Step 6: Final answer
    x = 130,638.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.