Home / 401,361,747.20-602,042,620.80-128,760,070.40

Finding the Fourth Proportional to 401,361,747.20, 602,042,620.80 and 128,760,070.40

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Solution

The fourth proportional to 401,361,747.20, 602,042,620.80 and 128,760,070.40 is: 193,140,105.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,361,747.20 : 602,042,620.80 = 128,760,070.40 : x
  2. Step 2: Convert to fraction form
    401,361,747.20/602,042,620.80 = 128,760,070.40/x
  3. Step 3: Cross multiply
    401,361,747.20x = 602,042,620.80 × 128,760,070.40
  4. Step 4: Simplify right side
    401,361,747.20x = 77,519,050,238,008,496
  5. Step 5: Solve for x
    x = 77,519,050,238,008,496/401,361,747.20
  6. Step 6: Final answer
    x = 193,140,105.60

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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.