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Finding the Fourth Proportional to 153,154.32, 229,731.48 and 69,990

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Solution

The fourth proportional to 153,154.32, 229,731.48 and 69,990 is: 104,985

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,154.32 : 229,731.48 = 69,990 : x
  2. Step 2: Convert to fraction form
    153,154.32/229,731.48 = 69,990/x
  3. Step 3: Cross multiply
    153,154.32x = 229,731.48 × 69,990
  4. Step 4: Simplify right side
    153,154.32x = 16,078,906,285.20
  5. Step 5: Solve for x
    x = 16,078,906,285.20/153,154.32
  6. Step 6: Final answer
    x = 104,985

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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.