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Finding the Fourth Proportional to 70,359.84, 105,561.36 and 28,810.08

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Solution

The fourth proportional to 70,359.84, 105,561.36 and 28,810.08 is: 43,223.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,359.84 : 105,561.36 = 28,810.08 : x
  2. Step 2: Convert to fraction form
    70,359.84/105,561.36 = 28,810.08/x
  3. Step 3: Cross multiply
    70,359.84x = 105,561.36 × 28,810.08
  4. Step 4: Simplify right side
    70,359.84x = 3,041,231,226.51
  5. Step 5: Solve for x
    x = 3,041,231,226.51/70,359.84
  6. Step 6: Final answer
    x = 43,223.96

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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.