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Finding the Fourth Proportional to 71,688.84, 98,912.52 and 43,389.06

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Solution

The fourth proportional to 71,688.84, 98,912.52 and 43,389.06 is: 59,865.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,688.84 : 98,912.52 = 43,389.06 : x
  2. Step 2: Convert to fraction form
    71,688.84/98,912.52 = 43,389.06/x
  3. Step 3: Cross multiply
    71,688.84x = 98,912.52 × 43,389.06
  4. Step 4: Simplify right side
    71,688.84x = 4,291,721,265.03
  5. Step 5: Solve for x
    x = 4,291,721,265.03/71,688.84
  6. Step 6: Final answer
    x = 59,865.96

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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.