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Finding the Fourth Proportional to 140,070.60, 209,930.68 and 69,969.48

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Solution

The fourth proportional to 140,070.60, 209,930.68 and 69,969.48 is: 104,866.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,070.60 : 209,930.68 = 69,969.48 : x
  2. Step 2: Convert to fraction form
    140,070.60/209,930.68 = 69,969.48/x
  3. Step 3: Cross multiply
    140,070.60x = 209,930.68 × 69,969.48
  4. Step 4: Simplify right side
    140,070.60x = 14,688,740,515.65
  5. Step 5: Solve for x
    x = 14,688,740,515.65/140,070.60
  6. Step 6: Final answer
    x = 104,866.69

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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.