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Finding the Fourth Proportional to 66,430.64, 99,644.40 and 16,510.88

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Solution

The fourth proportional to 66,430.64, 99,644.40 and 16,510.88 is: 24,765.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,430.64 : 99,644.40 = 16,510.88 : x
  2. Step 2: Convert to fraction form
    66,430.64/99,644.40 = 16,510.88/x
  3. Step 3: Cross multiply
    66,430.64x = 99,644.40 × 16,510.88
  4. Step 4: Simplify right side
    66,430.64x = 1,645,216,731.07
  5. Step 5: Solve for x
    x = 1,645,216,731.07/66,430.64
  6. Step 6: Final answer
    x = 24,765.93

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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.