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Finding the Fourth Proportional to 70,667.51, 105,999.75 and 20,746.49

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Solution

The fourth proportional to 70,667.51, 105,999.75 and 20,746.49 is: 31,119.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,667.51 : 105,999.75 = 20,746.49 : x
  2. Step 2: Convert to fraction form
    70,667.51/105,999.75 = 20,746.49/x
  3. Step 3: Cross multiply
    70,667.51x = 105,999.75 × 20,746.49
  4. Step 4: Simplify right side
    70,667.51x = 2,199,122,753.38
  5. Step 5: Solve for x
    x = 2,199,122,753.38/70,667.51
  6. Step 6: Final answer
    x = 31,119.29

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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.