Home / 112,346,721.20-168,520,081.80-78,306,503.60

Finding the Fourth Proportional to 112,346,721.20, 168,520,081.80 and 78,306,503.60

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Solution

The fourth proportional to 112,346,721.20, 168,520,081.80 and 78,306,503.60 is: 117,459,755.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,346,721.20 : 168,520,081.80 = 78,306,503.60 : x
  2. Step 2: Convert to fraction form
    112,346,721.20/168,520,081.80 = 78,306,503.60/x
  3. Step 3: Cross multiply
    112,346,721.20x = 168,520,081.80 × 78,306,503.60
  4. Step 4: Simplify right side
    112,346,721.20x = 13,196,218,392,143,994
  5. Step 5: Solve for x
    x = 13,196,218,392,143,994/112,346,721.20
  6. Step 6: Final answer
    x = 117,459,755.40

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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.