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Finding the Fourth Proportional to 228,011.70, 342,017.55 and 85,856.70

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Solution

The fourth proportional to 228,011.70, 342,017.55 and 85,856.70 is: 128,785.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,011.70 : 342,017.55 = 85,856.70 : x
  2. Step 2: Convert to fraction form
    228,011.70/342,017.55 = 85,856.70/x
  3. Step 3: Cross multiply
    228,011.70x = 342,017.55 × 85,856.70
  4. Step 4: Simplify right side
    228,011.70x = 29,364,498,185.09
  5. Step 5: Solve for x
    x = 29,364,498,185.09/228,011.70
  6. Step 6: Final answer
    x = 128,785.05

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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.