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Finding the Fourth Proportional to 130,522.80, 195,638.40 and 74,389.80

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Solution

The fourth proportional to 130,522.80, 195,638.40 and 74,389.80 is: 111,501.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,522.80 : 195,638.40 = 74,389.80 : x
  2. Step 2: Convert to fraction form
    130,522.80/195,638.40 = 74,389.80/x
  3. Step 3: Cross multiply
    130,522.80x = 195,638.40 × 74,389.80
  4. Step 4: Simplify right side
    130,522.80x = 14,553,501,448.32
  5. Step 5: Solve for x
    x = 14,553,501,448.32/130,522.80
  6. Step 6: Final answer
    x = 111,501.60

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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.