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Finding the Fourth Proportional to 72,421.80, 108,632.70 and 70,002.60

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Solution

The fourth proportional to 72,421.80, 108,632.70 and 70,002.60 is: 105,003.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,421.80 : 108,632.70 = 70,002.60 : x
  2. Step 2: Convert to fraction form
    72,421.80/108,632.70 = 70,002.60/x
  3. Step 3: Cross multiply
    72,421.80x = 108,632.70 × 70,002.60
  4. Step 4: Simplify right side
    72,421.80x = 7,604,571,445.02
  5. Step 5: Solve for x
    x = 7,604,571,445.02/72,421.80
  6. Step 6: Final answer
    x = 105,003.90

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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.