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Finding the Fourth Proportional to 66,038.97, 99,070.79 and 21,678.42

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Solution

The fourth proportional to 66,038.97, 99,070.79 and 21,678.42 is: 32,521.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,038.97 : 99,070.79 = 21,678.42 : x
  2. Step 2: Convert to fraction form
    66,038.97/99,070.79 = 21,678.42/x
  3. Step 3: Cross multiply
    66,038.97x = 99,070.79 × 21,678.42
  4. Step 4: Simplify right side
    66,038.97x = 2,147,698,086.96
  5. Step 5: Solve for x
    x = 2,147,698,086.96/66,038.97
  6. Step 6: Final answer
    x = 32,521.68

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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.