Home / 431,779,918.47-647,518,335-120,803,969.62

Finding the Fourth Proportional to 431,779,918.47, 647,518,335 and 120,803,969.62

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Solution

The fourth proportional to 431,779,918.47, 647,518,335 and 120,803,969.62 is: 181,163,555.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,779,918.47 : 647,518,335 = 120,803,969.62 : x
  2. Step 2: Convert to fraction form
    431,779,918.47/647,518,335 = 120,803,969.62/x
  3. Step 3: Cross multiply
    431,779,918.47x = 647,518,335 × 120,803,969.62
  4. Step 4: Simplify right side
    431,779,918.47x = 78,222,785,269,732,992
  5. Step 5: Solve for x
    x = 78,222,785,269,732,992/431,779,918.47
  6. Step 6: Final answer
    x = 181,163,555.61

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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.