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Finding the Fourth Proportional to 208,240.64, 312,364.80 and 75,130.88

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Solution

The fourth proportional to 208,240.64, 312,364.80 and 75,130.88 is: 112,697.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,240.64 : 312,364.80 = 75,130.88 : x
  2. Step 2: Convert to fraction form
    208,240.64/312,364.80 = 75,130.88/x
  3. Step 3: Cross multiply
    208,240.64x = 312,364.80 × 75,130.88
  4. Step 4: Simplify right side
    208,240.64x = 23,468,242,305.02
  5. Step 5: Solve for x
    x = 23,468,242,305.02/208,240.64
  6. Step 6: Final answer
    x = 112,697.71

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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.