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Finding the Fourth Proportional to 280,068.10, 420,102.15 and 93,079.60

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Solution

The fourth proportional to 280,068.10, 420,102.15 and 93,079.60 is: 139,619.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,068.10 : 420,102.15 = 93,079.60 : x
  2. Step 2: Convert to fraction form
    280,068.10/420,102.15 = 93,079.60/x
  3. Step 3: Cross multiply
    280,068.10x = 420,102.15 × 93,079.60
  4. Step 4: Simplify right side
    280,068.10x = 39,102,940,081.14
  5. Step 5: Solve for x
    x = 39,102,940,081.14/280,068.10
  6. Step 6: Final answer
    x = 139,619.40

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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.