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Finding the Fourth Proportional to 70,382,457.98, 105,590,210.98 and 21,857,807.42

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Solution

The fourth proportional to 70,382,457.98, 105,590,210.98 and 21,857,807.42 is: 32,791,842.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,382,457.98 : 105,590,210.98 = 21,857,807.42 : x
  2. Step 2: Convert to fraction form
    70,382,457.98/105,590,210.98 = 21,857,807.42/x
  3. Step 3: Cross multiply
    70,382,457.98x = 105,590,210.98 × 21,857,807.42
  4. Step 4: Simplify right side
    70,382,457.98x = 2,307,970,497,038,010
  5. Step 5: Solve for x
    x = 2,307,970,497,038,010/70,382,457.98
  6. Step 6: Final answer
    x = 32,791,842.79

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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.