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Finding the Fourth Proportional to 64,763.15, 89,346.65 and 47,807.82

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Solution

The fourth proportional to 64,763.15, 89,346.65 and 47,807.82 is: 65,955.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,763.15 : 89,346.65 = 47,807.82 : x
  2. Step 2: Convert to fraction form
    64,763.15/89,346.65 = 47,807.82/x
  3. Step 3: Cross multiply
    64,763.15x = 89,346.65 × 47,807.82
  4. Step 4: Simplify right side
    64,763.15x = 4,271,468,321.76
  5. Step 5: Solve for x
    x = 4,271,468,321.76/64,763.15
  6. Step 6: Final answer
    x = 65,955.23

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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.