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Finding the Fourth Proportional to 280,105.65, 420,103.80 and 93,117.15

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Solution

The fourth proportional to 280,105.65, 420,103.80 and 93,117.15 is: 139,657.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,105.65 : 420,103.80 = 93,117.15 : x
  2. Step 2: Convert to fraction form
    280,105.65/420,103.80 = 93,117.15/x
  3. Step 3: Cross multiply
    280,105.65x = 420,103.80 × 93,117.15
  4. Step 4: Simplify right side
    280,105.65x = 39,118,868,560.17
  5. Step 5: Solve for x
    x = 39,118,868,560.17/280,105.65
  6. Step 6: Final answer
    x = 139,657.55

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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.