Home / 81,049,279.20-121,573,918.80-20,465,005.20

Finding the Fourth Proportional to 81,049,279.20, 121,573,918.80 and 20,465,005.20

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Solution

The fourth proportional to 81,049,279.20, 121,573,918.80 and 20,465,005.20 is: 30,697,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,049,279.20 : 121,573,918.80 = 20,465,005.20 : x
  2. Step 2: Convert to fraction form
    81,049,279.20/121,573,918.80 = 20,465,005.20/x
  3. Step 3: Cross multiply
    81,049,279.20x = 121,573,918.80 × 20,465,005.20
  4. Step 4: Simplify right side
    81,049,279.20x = 2,488,010,880,426,377.50
  5. Step 5: Solve for x
    x = 2,488,010,880,426,377.50/81,049,279.20
  6. Step 6: Final answer
    x = 30,697,507.80

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1.5x scale

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.