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Finding the Fourth Proportional to 70,060.40, 105,090.60 and 65,913.20

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Solution

The fourth proportional to 70,060.40, 105,090.60 and 65,913.20 is: 98,869.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,060.40 : 105,090.60 = 65,913.20 : x
  2. Step 2: Convert to fraction form
    70,060.40/105,090.60 = 65,913.20/x
  3. Step 3: Cross multiply
    70,060.40x = 105,090.60 × 65,913.20
  4. Step 4: Simplify right side
    70,060.40x = 6,926,857,735.92
  5. Step 5: Solve for x
    x = 6,926,857,735.92/70,060.40
  6. Step 6: Final answer
    x = 98,869.80

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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.