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Finding the Fourth Proportional to 153,485.89, 229,803.68 and 78,444.45

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Solution

The fourth proportional to 153,485.89, 229,803.68 and 78,444.45 is: 117,449.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,485.89 : 229,803.68 = 78,444.45 : x
  2. Step 2: Convert to fraction form
    153,485.89/229,803.68 = 78,444.45/x
  3. Step 3: Cross multiply
    153,485.89x = 229,803.68 × 78,444.45
  4. Step 4: Simplify right side
    153,485.89x = 18,026,823,481.69
  5. Step 5: Solve for x
    x = 18,026,823,481.69/153,485.89
  6. Step 6: Final answer
    x = 117,449.39

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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.