Home / 123,547,456.80-185,321,185.20-78,309,799.20

Finding the Fourth Proportional to 123,547,456.80, 185,321,185.20 and 78,309,799.20

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Solution

The fourth proportional to 123,547,456.80, 185,321,185.20 and 78,309,799.20 is: 117,464,698.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,547,456.80 : 185,321,185.20 = 78,309,799.20 : x
  2. Step 2: Convert to fraction form
    123,547,456.80/185,321,185.20 = 78,309,799.20/x
  3. Step 3: Cross multiply
    123,547,456.80x = 185,321,185.20 × 78,309,799.20
  4. Step 4: Simplify right side
    123,547,456.80x = 14,512,464,800,518,012
  5. Step 5: Solve for x
    x = 14,512,464,800,518,012/123,547,456.80
  6. Step 6: Final answer
    x = 117,464,698.80

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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.