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Finding the Fourth Proportional to 280,023.40, 420,035.10 and 93,034.90

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Solution

The fourth proportional to 280,023.40, 420,035.10 and 93,034.90 is: 139,552.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,023.40 : 420,035.10 = 93,034.90 : x
  2. Step 2: Convert to fraction form
    280,023.40/420,035.10 = 93,034.90/x
  3. Step 3: Cross multiply
    280,023.40x = 420,035.10 × 93,034.90
  4. Step 4: Simplify right side
    280,023.40x = 39,077,923,524.99
  5. Step 5: Solve for x
    x = 39,077,923,524.99/280,023.40
  6. Step 6: Final answer
    x = 139,552.35

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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.