Home / 78,776,380.80-118,070,092.80-40,418,150.40

Finding the Fourth Proportional to 78,776,380.80, 118,070,092.80 and 40,418,150.40

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Solution

The fourth proportional to 78,776,380.80, 118,070,092.80 and 40,418,150.40 is: 60,578,751.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,776,380.80 : 118,070,092.80 = 40,418,150.40 : x
  2. Step 2: Convert to fraction form
    78,776,380.80/118,070,092.80 = 40,418,150.40/x
  3. Step 3: Cross multiply
    78,776,380.80x = 118,070,092.80 × 40,418,150.40
  4. Step 4: Simplify right side
    78,776,380.80x = 4,772,174,768,532,357
  5. Step 5: Solve for x
    x = 4,772,174,768,532,357/78,776,380.80
  6. Step 6: Final answer
    x = 60,578,751.14

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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.