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Finding the Fourth Proportional to 340,079.80, 510,138.90 and 103,430.20

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Solution

The fourth proportional to 340,079.80, 510,138.90 and 103,430.20 is: 155,151.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,079.80 : 510,138.90 = 103,430.20 : x
  2. Step 2: Convert to fraction form
    340,079.80/510,138.90 = 103,430.20/x
  3. Step 3: Cross multiply
    340,079.80x = 510,138.90 × 103,430.20
  4. Step 4: Simplify right side
    340,079.80x = 52,763,768,454.78
  5. Step 5: Solve for x
    x = 52,763,768,454.78/340,079.80
  6. Step 6: Final answer
    x = 155,151.14

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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.