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Finding the Fourth Proportional to 103,290.70, 155,264.10 and 97,385.80

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Solution

The fourth proportional to 103,290.70, 155,264.10 and 97,385.80 is: 146,388.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,290.70 : 155,264.10 = 97,385.80 : x
  2. Step 2: Convert to fraction form
    103,290.70/155,264.10 = 97,385.80/x
  3. Step 3: Cross multiply
    103,290.70x = 155,264.10 × 97,385.80
  4. Step 4: Simplify right side
    103,290.70x = 15,120,518,589.78
  5. Step 5: Solve for x
    x = 15,120,518,589.78/103,290.70
  6. Step 6: Final answer
    x = 146,388.00

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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.