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Finding the Fourth Proportional to 64,489.16, 89,013.63 and 38,995.58

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Solution

The fourth proportional to 64,489.16, 89,013.63 and 38,995.58 is: 53,825.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,489.16 : 89,013.63 = 38,995.58 : x
  2. Step 2: Convert to fraction form
    64,489.16/89,013.63 = 38,995.58/x
  3. Step 3: Cross multiply
    64,489.16x = 89,013.63 × 38,995.58
  4. Step 4: Simplify right side
    64,489.16x = 3,471,137,997.82
  5. Step 5: Solve for x
    x = 3,471,137,997.82/64,489.16
  6. Step 6: Final answer
    x = 53,825.14

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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.