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Finding the Fourth Proportional to 112,955,863.70, 169,433,795.55 and 78,518,486.90

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Solution

The fourth proportional to 112,955,863.70, 169,433,795.55 and 78,518,486.90 is: 117,777,730.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,955,863.70 : 169,433,795.55 = 78,518,486.90 : x
  2. Step 2: Convert to fraction form
    112,955,863.70/169,433,795.55 = 78,518,486.90/x
  3. Step 3: Cross multiply
    112,955,863.70x = 169,433,795.55 × 78,518,486.90
  4. Step 4: Simplify right side
    112,955,863.70x = 13,303,685,256,309,956
  5. Step 5: Solve for x
    x = 13,303,685,256,309,956/112,955,863.70
  6. Step 6: Final answer
    x = 117,777,730.35

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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.