Home / 109,872.32-151,598.40-74,128.64

Finding the Fourth Proportional to 109,872.32, 151,598.40 and 74,128.64

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Solution

The fourth proportional to 109,872.32, 151,598.40 and 74,128.64 is: 102,280.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,872.32 : 151,598.40 = 74,128.64 : x
  2. Step 2: Convert to fraction form
    109,872.32/151,598.40 = 74,128.64/x
  3. Step 3: Cross multiply
    109,872.32x = 151,598.40 × 74,128.64
  4. Step 4: Simplify right side
    109,872.32x = 11,237,783,218.18
  5. Step 5: Solve for x
    x = 11,237,783,218.18/109,872.32
  6. Step 6: Final answer
    x = 102,280.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.