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Finding the Fourth Proportional to 365,011.50, 547,157.40 and 128,188.10

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Solution

The fourth proportional to 365,011.50, 547,157.40 and 128,188.10 is: 192,155.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,011.50 : 547,157.40 = 128,188.10 : x
  2. Step 2: Convert to fraction form
    365,011.50/547,157.40 = 128,188.10/x
  3. Step 3: Cross multiply
    365,011.50x = 547,157.40 × 128,188.10
  4. Step 4: Simplify right side
    365,011.50x = 70,139,067,506.94
  5. Step 5: Solve for x
    x = 70,139,067,506.94/365,011.50
  6. Step 6: Final answer
    x = 192,155.77

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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.