Home / 86,538,307.32-129,807,767.64-20,959,489.08

Finding the Fourth Proportional to 86,538,307.32, 129,807,767.64 and 20,959,489.08

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Solution

The fourth proportional to 86,538,307.32, 129,807,767.64 and 20,959,489.08 is: 31,439,307.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,538,307.32 : 129,807,767.64 = 20,959,489.08 : x
  2. Step 2: Convert to fraction form
    86,538,307.32/129,807,767.64 = 20,959,489.08/x
  3. Step 3: Cross multiply
    86,538,307.32x = 129,807,767.64 × 20,959,489.08
  4. Step 4: Simplify right side
    86,538,307.32x = 2,720,704,488,349,757
  5. Step 5: Solve for x
    x = 2,720,704,488,349,757/86,538,307.32
  6. Step 6: Final answer
    x = 31,439,307.89

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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.