Home / 211,378,421.90-316,963,899.38-86,858,493.50

Finding the Fourth Proportional to 211,378,421.90, 316,963,899.38 and 86,858,493.50

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Solution

The fourth proportional to 211,378,421.90, 316,963,899.38 and 86,858,493.50 is: 130,245,114.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,378,421.90 : 316,963,899.38 = 86,858,493.50 : x
  2. Step 2: Convert to fraction form
    211,378,421.90/316,963,899.38 = 86,858,493.50/x
  3. Step 3: Cross multiply
    211,378,421.90x = 316,963,899.38 × 86,858,493.50
  4. Step 4: Simplify right side
    211,378,421.90x = 27,531,006,794,032,384
  5. Step 5: Solve for x
    x = 27,531,006,794,032,384/211,378,421.90
  6. Step 6: Final answer
    x = 130,245,114.65

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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.