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Finding the Fourth Proportional to 70,242.36, 105,405.12 and 25,900.32

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Solution

The fourth proportional to 70,242.36, 105,405.12 and 25,900.32 is: 38,865.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,242.36 : 105,405.12 = 25,900.32 : x
  2. Step 2: Convert to fraction form
    70,242.36/105,405.12 = 25,900.32/x
  3. Step 3: Cross multiply
    70,242.36x = 105,405.12 × 25,900.32
  4. Step 4: Simplify right side
    70,242.36x = 2,730,026,337.64
  5. Step 5: Solve for x
    x = 2,730,026,337.64/70,242.36
  6. Step 6: Final answer
    x = 38,865.81

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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.