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Finding the Fourth Proportional to 168,681,718.80, 252,854,616.60 and 77,646,531.60

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Solution

The fourth proportional to 168,681,718.80, 252,854,616.60 and 77,646,531.60 is: 116,392,482.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,681,718.80 : 252,854,616.60 = 77,646,531.60 : x
  2. Step 2: Convert to fraction form
    168,681,718.80/252,854,616.60 = 77,646,531.60/x
  3. Step 3: Cross multiply
    168,681,718.80x = 252,854,616.60 × 77,646,531.60
  4. Step 4: Simplify right side
    168,681,718.80x = 19,633,283,978,037,784
  5. Step 5: Solve for x
    x = 19,633,283,978,037,784/168,681,718.80
  6. Step 6: Final answer
    x = 116,392,482.35

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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.