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Finding the Fourth Proportional to 70,632.40, 106,121.40 and 53,136.40

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Solution

The fourth proportional to 70,632.40, 106,121.40 and 53,136.40 is: 79,834.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,632.40 : 106,121.40 = 53,136.40 : x
  2. Step 2: Convert to fraction form
    70,632.40/106,121.40 = 53,136.40/x
  3. Step 3: Cross multiply
    70,632.40x = 106,121.40 × 53,136.40
  4. Step 4: Simplify right side
    70,632.40x = 5,638,909,158.96
  5. Step 5: Solve for x
    x = 5,638,909,158.96/70,632.40
  6. Step 6: Final answer
    x = 79,834.60

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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.