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Finding the Fourth Proportional to 98,779.66, 136,315.92 and 53,457.66

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Solution

The fourth proportional to 98,779.66, 136,315.92 and 53,457.66 is: 73,771.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,779.66 : 136,315.92 = 53,457.66 : x
  2. Step 2: Convert to fraction form
    98,779.66/136,315.92 = 53,457.66/x
  3. Step 3: Cross multiply
    98,779.66x = 136,315.92 × 53,457.66
  4. Step 4: Simplify right side
    98,779.66x = 7,287,129,672.01
  5. Step 5: Solve for x
    x = 7,287,129,672.01/98,779.66
  6. Step 6: Final answer
    x = 73,771.56

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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.