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Finding the Fourth Proportional to 280,068.90, 420,103.35 and 93,080.40

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Solution

The fourth proportional to 280,068.90, 420,103.35 and 93,080.40 is: 139,620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,068.90 : 420,103.35 = 93,080.40 : x
  2. Step 2: Convert to fraction form
    280,068.90/420,103.35 = 93,080.40/x
  3. Step 3: Cross multiply
    280,068.90x = 420,103.35 × 93,080.40
  4. Step 4: Simplify right side
    280,068.90x = 39,103,387,859.34
  5. Step 5: Solve for x
    x = 39,103,387,859.34/280,068.90
  6. Step 6: Final answer
    x = 139,620.60

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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.