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Finding the Fourth Proportional to 72,958.93, 109,405.58 and 70,662.58

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Solution

The fourth proportional to 72,958.93, 109,405.58 and 70,662.58 is: 105,962.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,958.93 : 109,405.58 = 70,662.58 : x
  2. Step 2: Convert to fraction form
    72,958.93/109,405.58 = 70,662.58/x
  3. Step 3: Cross multiply
    72,958.93x = 109,405.58 × 70,662.58
  4. Step 4: Simplify right side
    72,958.93x = 7,730,880,549.20
  5. Step 5: Solve for x
    x = 7,730,880,549.20/72,958.93
  6. Step 6: Final answer
    x = 105,962.09

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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.