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Finding the Fourth Proportional to 90,595.84, 135,888.96 and 28,259.20

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Solution

The fourth proportional to 90,595.84, 135,888.96 and 28,259.20 is: 42,387.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,595.84 : 135,888.96 = 28,259.20 : x
  2. Step 2: Convert to fraction form
    90,595.84/135,888.96 = 28,259.20/x
  3. Step 3: Cross multiply
    90,595.84x = 135,888.96 × 28,259.20
  4. Step 4: Simplify right side
    90,595.84x = 3,840,113,298.43
  5. Step 5: Solve for x
    x = 3,840,113,298.43/90,595.84
  6. Step 6: Final answer
    x = 42,387.30

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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.