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Finding the Fourth Proportional to 70,217,998.80, 105,326,998.20 and 69,210,229.20

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Solution

The fourth proportional to 70,217,998.80, 105,326,998.20 and 69,210,229.20 is: 103,815,343.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,217,998.80 : 105,326,998.20 = 69,210,229.20 : x
  2. Step 2: Convert to fraction form
    70,217,998.80/105,326,998.20 = 69,210,229.20/x
  3. Step 3: Cross multiply
    70,217,998.80x = 105,326,998.20 × 69,210,229.20
  4. Step 4: Simplify right side
    70,217,998.80x = 7,289,705,686,369,988
  5. Step 5: Solve for x
    x = 7,289,705,686,369,988/70,217,998.80
  6. Step 6: Final answer
    x = 103,815,343.80

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1.5x scale

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.