Home / 78,741,531.20-118,112,296.80-30,872,475.20

Finding the Fourth Proportional to 78,741,531.20, 118,112,296.80 and 30,872,475.20

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Solution

The fourth proportional to 78,741,531.20, 118,112,296.80 and 30,872,475.20 is: 46,308,712.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,741,531.20 : 118,112,296.80 = 30,872,475.20 : x
  2. Step 2: Convert to fraction form
    78,741,531.20/118,112,296.80 = 30,872,475.20/x
  3. Step 3: Cross multiply
    78,741,531.20x = 118,112,296.80 × 30,872,475.20
  4. Step 4: Simplify right side
    78,741,531.20x = 3,646,418,953,773,039
  5. Step 5: Solve for x
    x = 3,646,418,953,773,039/78,741,531.20
  6. Step 6: Final answer
    x = 46,308,712.80

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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.