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Finding the Fourth Proportional to 62,779.90, 86,410.92 and 56,798.86

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Solution

The fourth proportional to 62,779.90, 86,410.92 and 56,798.86 is: 78,178.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,779.90 : 86,410.92 = 56,798.86 : x
  2. Step 2: Convert to fraction form
    62,779.90/86,410.92 = 56,798.86/x
  3. Step 3: Cross multiply
    62,779.90x = 86,410.92 × 56,798.86
  4. Step 4: Simplify right side
    62,779.90x = 4,908,041,747.55
  5. Step 5: Solve for x
    x = 4,908,041,747.55/62,779.90
  6. Step 6: Final answer
    x = 78,178.55

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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.