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Finding the Fourth Proportional to 71,011.68, 98,000.64 and 39,180.48

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Solution

The fourth proportional to 71,011.68, 98,000.64 and 39,180.48 is: 54,071.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,011.68 : 98,000.64 = 39,180.48 : x
  2. Step 2: Convert to fraction form
    71,011.68/98,000.64 = 39,180.48/x
  3. Step 3: Cross multiply
    71,011.68x = 98,000.64 × 39,180.48
  4. Step 4: Simplify right side
    71,011.68x = 3,839,712,115.51
  5. Step 5: Solve for x
    x = 3,839,712,115.51/71,011.68
  6. Step 6: Final answer
    x = 54,071.56

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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.