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Finding the Fourth Proportional to 135,624.70, 203,437.05 and 128,712.70

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Solution

The fourth proportional to 135,624.70, 203,437.05 and 128,712.70 is: 193,069.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,624.70 : 203,437.05 = 128,712.70 : x
  2. Step 2: Convert to fraction form
    135,624.70/203,437.05 = 128,712.70/x
  3. Step 3: Cross multiply
    135,624.70x = 203,437.05 × 128,712.70
  4. Step 4: Simplify right side
    135,624.70x = 26,184,931,985.54
  5. Step 5: Solve for x
    x = 26,184,931,985.54/135,624.70
  6. Step 6: Final answer
    x = 193,069.05

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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.