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Finding the Fourth Proportional to 121,178,689.80, 181,768,034.70 and 70,034,382.60

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Solution

The fourth proportional to 121,178,689.80, 181,768,034.70 and 70,034,382.60 is: 105,051,573.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,178,689.80 : 181,768,034.70 = 70,034,382.60 : x
  2. Step 2: Convert to fraction form
    121,178,689.80/181,768,034.70 = 70,034,382.60/x
  3. Step 3: Cross multiply
    121,178,689.80x = 181,768,034.70 × 70,034,382.60
  4. Step 4: Simplify right side
    121,178,689.80x = 12,730,012,086,629,874
  5. Step 5: Solve for x
    x = 12,730,012,086,629,874/121,178,689.80
  6. Step 6: Final answer
    x = 105,051,573.90

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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.