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Finding the Fourth Proportional to 98,681.86, 136,172.74 and 55,658.98

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Solution

The fourth proportional to 98,681.86, 136,172.74 and 55,658.98 is: 76,804.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,681.86 : 136,172.74 = 55,658.98 : x
  2. Step 2: Convert to fraction form
    98,681.86/136,172.74 = 55,658.98/x
  3. Step 3: Cross multiply
    98,681.86x = 136,172.74 × 55,658.98
  4. Step 4: Simplify right side
    98,681.86x = 7,579,235,025.12
  5. Step 5: Solve for x
    x = 7,579,235,025.12/98,681.86
  6. Step 6: Final answer
    x = 76,804.75

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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.