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Finding the Fourth Proportional to 280,074.60, 420,111.90 and 93,061.80

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Solution

The fourth proportional to 280,074.60, 420,111.90 and 93,061.80 is: 139,592.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,074.60 : 420,111.90 = 93,061.80 : x
  2. Step 2: Convert to fraction form
    280,074.60/420,111.90 = 93,061.80/x
  3. Step 3: Cross multiply
    280,074.60x = 420,111.90 × 93,061.80
  4. Step 4: Simplify right side
    280,074.60x = 39,096,369,615.42
  5. Step 5: Solve for x
    x = 39,096,369,615.42/280,074.60
  6. Step 6: Final answer
    x = 139,592.70

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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.