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Finding the Fourth Proportional to 72,426.80, 108,640.20 and 70,007.60

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Solution

The fourth proportional to 72,426.80, 108,640.20 and 70,007.60 is: 105,011.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,426.80 : 108,640.20 = 70,007.60 : x
  2. Step 2: Convert to fraction form
    72,426.80/108,640.20 = 70,007.60/x
  3. Step 3: Cross multiply
    72,426.80x = 108,640.20 × 70,007.60
  4. Step 4: Simplify right side
    72,426.80x = 7,605,639,665.52
  5. Step 5: Solve for x
    x = 7,605,639,665.52/72,426.80
  6. Step 6: Final answer
    x = 105,011.40

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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.