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Finding the Fourth Proportional to 71,000.94, 97,980.75 and 39,171.18

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Solution

The fourth proportional to 71,000.94, 97,980.75 and 39,171.18 is: 54,055.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,000.94 : 97,980.75 = 39,171.18 : x
  2. Step 2: Convert to fraction form
    71,000.94/97,980.75 = 39,171.18/x
  3. Step 3: Cross multiply
    71,000.94x = 97,980.75 × 39,171.18
  4. Step 4: Simplify right side
    71,000.94x = 3,838,021,594.79
  5. Step 5: Solve for x
    x = 3,838,021,594.79/71,000.94
  6. Step 6: Final answer
    x = 54,055.93

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1.5x scale

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.