Home / 213,659,139.40-320,488,709.10-211,391,657.80

Finding the Fourth Proportional to 213,659,139.40, 320,488,709.10 and 211,391,657.80

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Solution

The fourth proportional to 213,659,139.40, 320,488,709.10 and 211,391,657.80 is: 317,087,486.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,659,139.40 : 320,488,709.10 = 211,391,657.80 : x
  2. Step 2: Convert to fraction form
    213,659,139.40/320,488,709.10 = 211,391,657.80/x
  3. Step 3: Cross multiply
    213,659,139.40x = 320,488,709.10 × 211,391,657.80
  4. Step 4: Simplify right side
    213,659,139.40x = 67,748,639,522,830,952
  5. Step 5: Solve for x
    x = 67,748,639,522,830,952/213,659,139.40
  6. Step 6: Final answer
    x = 317,087,486.70

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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.