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Finding the Fourth Proportional to 71,289.77, 98,378.69 and 39,457.98

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Solution

The fourth proportional to 71,289.77, 98,378.69 and 39,457.98 is: 54,451.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,289.77 : 98,378.69 = 39,457.98 : x
  2. Step 2: Convert to fraction form
    71,289.77/98,378.69 = 39,457.98/x
  3. Step 3: Cross multiply
    71,289.77x = 98,378.69 × 39,457.98
  4. Step 4: Simplify right side
    71,289.77x = 3,881,824,185.16
  5. Step 5: Solve for x
    x = 3,881,824,185.16/71,289.77
  6. Step 6: Final answer
    x = 54,451.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.