Home / 112,955,891.20-169,433,836.80-78,518,514.40

Finding the Fourth Proportional to 112,955,891.20, 169,433,836.80 and 78,518,514.40

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Solution

The fourth proportional to 112,955,891.20, 169,433,836.80 and 78,518,514.40 is: 117,777,771.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,955,891.20 : 169,433,836.80 = 78,518,514.40 : x
  2. Step 2: Convert to fraction form
    112,955,891.20/169,433,836.80 = 78,518,514.40/x
  3. Step 3: Cross multiply
    112,955,891.20x = 169,433,836.80 × 78,518,514.40
  4. Step 4: Simplify right side
    112,955,891.20x = 13,303,693,154,628,052
  5. Step 5: Solve for x
    x = 13,303,693,154,628,052/112,955,891.20
  6. Step 6: Final answer
    x = 117,777,771.60

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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.