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Finding the Fourth Proportional to 153,905.40, 230,490.90 and 74,765.40

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Solution

The fourth proportional to 153,905.40, 230,490.90 and 74,765.40 is: 111,969.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,905.40 : 230,490.90 = 74,765.40 : x
  2. Step 2: Convert to fraction form
    153,905.40/230,490.90 = 74,765.40/x
  3. Step 3: Cross multiply
    153,905.40x = 230,490.90 × 74,765.40
  4. Step 4: Simplify right side
    153,905.40x = 17,232,744,334.86
  5. Step 5: Solve for x
    x = 17,232,744,334.86/153,905.40
  6. Step 6: Final answer
    x = 111,969.72

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1.5x scale

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.