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Finding the Fourth Proportional to 100,976.80, 151,465.20 and 51,210.40

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Solution

The fourth proportional to 100,976.80, 151,465.20 and 51,210.40 is: 76,815.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,976.80 : 151,465.20 = 51,210.40 : x
  2. Step 2: Convert to fraction form
    100,976.80/151,465.20 = 51,210.40/x
  3. Step 3: Cross multiply
    100,976.80x = 151,465.20 × 51,210.40
  4. Step 4: Simplify right side
    100,976.80x = 7,756,593,478.08
  5. Step 5: Solve for x
    x = 7,756,593,478.08/100,976.80
  6. Step 6: Final answer
    x = 76,815.60

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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.