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Finding the Fourth Proportional to 64,130, 88,509.12 and 38,974.64

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Solution

The fourth proportional to 64,130, 88,509.12 and 38,974.64 is: 53,790.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,130 : 88,509.12 = 38,974.64 : x
  2. Step 2: Convert to fraction form
    64,130/88,509.12 = 38,974.64/x
  3. Step 3: Cross multiply
    64,130x = 88,509.12 × 38,974.64
  4. Step 4: Simplify right side
    64,130x = 3,449,611,088.72
  5. Step 5: Solve for x
    x = 3,449,611,088.72/64,130
  6. Step 6: Final answer
    x = 53,790.91

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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.