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Finding the Fourth Proportional to 60,399.40, 90,598.62 and 20,955.88

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Solution

The fourth proportional to 60,399.40, 90,598.62 and 20,955.88 is: 31,433.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,399.40 : 90,598.62 = 20,955.88 : x
  2. Step 2: Convert to fraction form
    60,399.40/90,598.62 = 20,955.88/x
  3. Step 3: Cross multiply
    60,399.40x = 90,598.62 × 20,955.88
  4. Step 4: Simplify right side
    60,399.40x = 1,898,573,808.89
  5. Step 5: Solve for x
    x = 1,898,573,808.89/60,399.40
  6. Step 6: Final answer
    x = 31,433.65

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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.