Home / 221,530,518.78-305,705,681.19-122,409,691.26

Finding the Fourth Proportional to 221,530,518.78, 305,705,681.19 and 122,409,691.26

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Solution

The fourth proportional to 221,530,518.78, 305,705,681.19 and 122,409,691.26 is: 168,921,818.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,530,518.78 : 305,705,681.19 = 122,409,691.26 : x
  2. Step 2: Convert to fraction form
    221,530,518.78/305,705,681.19 = 122,409,691.26/x
  3. Step 3: Cross multiply
    221,530,518.78x = 305,705,681.19 × 122,409,691.26
  4. Step 4: Simplify right side
    221,530,518.78x = 37,421,338,050,895,888
  5. Step 5: Solve for x
    x = 37,421,338,050,895,888/221,530,518.78
  6. Step 6: Final answer
    x = 168,921,818.34

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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.