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Finding the Fourth Proportional to 70,139.90, 105,210.26 and 23,392.64

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Solution

The fourth proportional to 70,139.90, 105,210.26 and 23,392.64 is: 35,089.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,139.90 : 105,210.26 = 23,392.64 : x
  2. Step 2: Convert to fraction form
    70,139.90/105,210.26 = 23,392.64/x
  3. Step 3: Cross multiply
    70,139.90x = 105,210.26 × 23,392.64
  4. Step 4: Simplify right side
    70,139.90x = 2,461,145,736.49
  5. Step 5: Solve for x
    x = 2,461,145,736.49/70,139.90
  6. Step 6: Final answer
    x = 35,089.10

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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.