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Finding the Fourth Proportional to 90,319, 135,511.08 and 48,154.72

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Solution

The fourth proportional to 90,319, 135,511.08 and 48,154.72 is: 72,249.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,319 : 135,511.08 = 48,154.72 : x
  2. Step 2: Convert to fraction form
    90,319/135,511.08 = 48,154.72/x
  3. Step 3: Cross multiply
    90,319x = 135,511.08 × 48,154.72
  4. Step 4: Simplify right side
    90,319x = 6,525,498,114.30
  5. Step 5: Solve for x
    x = 6,525,498,114.30/90,319
  6. Step 6: Final answer
    x = 72,249.45

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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.