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Finding the Fourth Proportional to 72,436.40, 108,784.20 and 70,103.60

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Solution

The fourth proportional to 72,436.40, 108,784.20 and 70,103.60 is: 105,280.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,436.40 : 108,784.20 = 70,103.60 : x
  2. Step 2: Convert to fraction form
    72,436.40/108,784.20 = 70,103.60/x
  3. Step 3: Cross multiply
    72,436.40x = 108,784.20 × 70,103.60
  4. Step 4: Simplify right side
    72,436.40x = 7,626,164,043.12
  5. Step 5: Solve for x
    x = 7,626,164,043.12/72,436.40
  6. Step 6: Final answer
    x = 105,280.83

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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.