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Finding the Fourth Proportional to 66,858,965.80, 100,301,036.22 and 47,642,050.60

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Solution

The fourth proportional to 66,858,965.80, 100,301,036.22 and 47,642,050.60 is: 71,472,045.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,858,965.80 : 100,301,036.22 = 47,642,050.60 : x
  2. Step 2: Convert to fraction form
    66,858,965.80/100,301,036.22 = 47,642,050.60/x
  3. Step 3: Cross multiply
    66,858,965.80x = 100,301,036.22 × 47,642,050.60
  4. Step 4: Simplify right side
    66,858,965.80x = 4,778,547,042,825,673
  5. Step 5: Solve for x
    x = 4,778,547,042,825,673/66,858,965.80
  6. Step 6: Final answer
    x = 71,472,045.46

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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.