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Finding the Fourth Proportional to 64,779.84, 89,437.44 and 52,871.58

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Solution

The fourth proportional to 64,779.84, 89,437.44 and 52,871.58 is: 72,996.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,779.84 : 89,437.44 = 52,871.58 : x
  2. Step 2: Convert to fraction form
    64,779.84/89,437.44 = 52,871.58/x
  3. Step 3: Cross multiply
    64,779.84x = 89,437.44 × 52,871.58
  4. Step 4: Simplify right side
    64,779.84x = 4,728,698,763.96
  5. Step 5: Solve for x
    x = 4,728,698,763.96/64,779.84
  6. Step 6: Final answer
    x = 72,996.46

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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.