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Finding the Fourth Proportional to 70,255.89, 105,368.31 and 20,325.06

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Solution

The fourth proportional to 70,255.89, 105,368.31 and 20,325.06 is: 30,483.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,255.89 : 105,368.31 = 20,325.06 : x
  2. Step 2: Convert to fraction form
    70,255.89/105,368.31 = 20,325.06/x
  3. Step 3: Cross multiply
    70,255.89x = 105,368.31 × 20,325.06
  4. Step 4: Simplify right side
    70,255.89x = 2,141,617,222.85
  5. Step 5: Solve for x
    x = 2,141,617,222.85/70,255.89
  6. Step 6: Final answer
    x = 30,483.10

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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.