Home / 84,185,609-115,332,354.40-81,038,138.43

Finding the Fourth Proportional to 84,185,609, 115,332,354.40 and 81,038,138.43

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Solution

The fourth proportional to 84,185,609, 115,332,354.40 and 81,038,138.43 is: 111,020,391.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,185,609 : 115,332,354.40 = 81,038,138.43 : x
  2. Step 2: Convert to fraction form
    84,185,609/115,332,354.40 = 81,038,138.43/x
  3. Step 3: Cross multiply
    84,185,609x = 115,332,354.40 × 81,038,138.43
  4. Step 4: Simplify right side
    84,185,609x = 9,346,319,301,325,020
  5. Step 5: Solve for x
    x = 9,346,319,301,325,020/84,185,609
  6. Step 6: Final answer
    x = 111,020,391.87

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.