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Finding the Fourth Proportional to 153,930.32, 212,363.88 and 103,662.80

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Solution

The fourth proportional to 153,930.32, 212,363.88 and 103,662.80 is: 143,014.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,930.32 : 212,363.88 = 103,662.80 : x
  2. Step 2: Convert to fraction form
    153,930.32/212,363.88 = 103,662.80/x
  3. Step 3: Cross multiply
    153,930.32x = 212,363.88 × 103,662.80
  4. Step 4: Simplify right side
    153,930.32x = 22,014,234,419.66
  5. Step 5: Solve for x
    x = 22,014,234,419.66/153,930.32
  6. Step 6: Final answer
    x = 143,014.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.