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Finding the Fourth Proportional to 90,460.92, 135,564.96 and 77,064.12

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Solution

The fourth proportional to 90,460.92, 135,564.96 and 77,064.12 is: 115,488.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,460.92 : 135,564.96 = 77,064.12 : x
  2. Step 2: Convert to fraction form
    90,460.92/135,564.96 = 77,064.12/x
  3. Step 3: Cross multiply
    90,460.92x = 135,564.96 × 77,064.12
  4. Step 4: Simplify right side
    90,460.92x = 10,447,194,345.24
  5. Step 5: Solve for x
    x = 10,447,194,345.24/90,460.92
  6. Step 6: Final answer
    x = 115,488.48

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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.