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Finding the Fourth Proportional to 148,942.80, 205,545.60 and 85,276.80

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Solution

The fourth proportional to 148,942.80, 205,545.60 and 85,276.80 is: 117,684.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,942.80 : 205,545.60 = 85,276.80 : x
  2. Step 2: Convert to fraction form
    148,942.80/205,545.60 = 85,276.80/x
  3. Step 3: Cross multiply
    148,942.80x = 205,545.60 × 85,276.80
  4. Step 4: Simplify right side
    148,942.80x = 17,528,271,022.08
  5. Step 5: Solve for x
    x = 17,528,271,022.08/148,942.80
  6. Step 6: Final answer
    x = 117,684.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.