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Finding the Fourth Proportional to 272,595.76, 408,959.52 and 85,607.26

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Solution

The fourth proportional to 272,595.76, 408,959.52 and 85,607.26 is: 128,431.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,595.76 : 408,959.52 = 85,607.26 : x
  2. Step 2: Convert to fraction form
    272,595.76/408,959.52 = 85,607.26/x
  3. Step 3: Cross multiply
    272,595.76x = 408,959.52 × 85,607.26
  4. Step 4: Simplify right side
    272,595.76x = 35,009,903,958.12
  5. Step 5: Solve for x
    x = 35,009,903,958.12/272,595.76
  6. Step 6: Final answer
    x = 128,431.58

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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.