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Finding the Fourth Proportional to 70,004.79, 105,012.45 and 20,084.49

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Solution

The fourth proportional to 70,004.79, 105,012.45 and 20,084.49 is: 30,128.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,004.79 : 105,012.45 = 20,084.49 : x
  2. Step 2: Convert to fraction form
    70,004.79/105,012.45 = 20,084.49/x
  3. Step 3: Cross multiply
    70,004.79x = 105,012.45 × 20,084.49
  4. Step 4: Simplify right side
    70,004.79x = 2,109,121,501.90
  5. Step 5: Solve for x
    x = 2,109,121,501.90/70,004.79
  6. Step 6: Final answer
    x = 30,128.25

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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.