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Finding the Fourth Proportional to 239,678.55, 359,491.28 and 85,798.42

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Solution

The fourth proportional to 239,678.55, 359,491.28 and 85,798.42 is: 128,688.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,678.55 : 359,491.28 = 85,798.42 : x
  2. Step 2: Convert to fraction form
    239,678.55/359,491.28 = 85,798.42/x
  3. Step 3: Cross multiply
    239,678.55x = 359,491.28 × 85,798.42
  4. Step 4: Simplify right side
    239,678.55x = 30,843,782,500.06
  5. Step 5: Solve for x
    x = 30,843,782,500.06/239,678.55
  6. Step 6: Final answer
    x = 128,688.12

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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.