Home / 66,429,713.40-99,644,570.10-21,005,431.80

Finding the Fourth Proportional to 66,429,713.40, 99,644,570.10 and 21,005,431.80

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Solution

The fourth proportional to 66,429,713.40, 99,644,570.10 and 21,005,431.80 is: 31,508,147.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,429,713.40 : 99,644,570.10 = 21,005,431.80 : x
  2. Step 2: Convert to fraction form
    66,429,713.40/99,644,570.10 = 21,005,431.80/x
  3. Step 3: Cross multiply
    66,429,713.40x = 99,644,570.10 × 21,005,431.80
  4. Step 4: Simplify right side
    66,429,713.40x = 2,093,077,221,475,869.25
  5. Step 5: Solve for x
    x = 2,093,077,221,475,869.25/66,429,713.40
  6. Step 6: Final answer
    x = 31,508,147.70

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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.