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Finding the Fourth Proportional to 85,530.30, 128,295.45 and 50,538.30

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Solution

The fourth proportional to 85,530.30, 128,295.45 and 50,538.30 is: 75,807.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,530.30 : 128,295.45 = 50,538.30 : x
  2. Step 2: Convert to fraction form
    85,530.30/128,295.45 = 50,538.30/x
  3. Step 3: Cross multiply
    85,530.30x = 128,295.45 × 50,538.30
  4. Step 4: Simplify right side
    85,530.30x = 6,483,833,940.74
  5. Step 5: Solve for x
    x = 6,483,833,940.74/85,530.30
  6. Step 6: Final answer
    x = 75,807.45

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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.