Home / 208,108,318.90-287,207,116.05-115,317,932.98

Finding the Fourth Proportional to 208,108,318.90, 287,207,116.05 and 115,317,932.98

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Solution

The fourth proportional to 208,108,318.90, 287,207,116.05 and 115,317,932.98 is: 159,148,520.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,108,318.90 : 287,207,116.05 = 115,317,932.98 : x
  2. Step 2: Convert to fraction form
    208,108,318.90/287,207,116.05 = 115,317,932.98/x
  3. Step 3: Cross multiply
    208,108,318.90x = 287,207,116.05 × 115,317,932.98
  4. Step 4: Simplify right side
    208,108,318.90x = 33,120,130,960,032,984
  5. Step 5: Solve for x
    x = 33,120,130,960,032,984/208,108,318.90
  6. Step 6: Final answer
    x = 159,148,520.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.