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Finding the Fourth Proportional to 61,090, 91,655.79 and 34,403.74

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Solution

The fourth proportional to 61,090, 91,655.79 and 34,403.74 is: 51,617.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,090 : 91,655.79 = 34,403.74 : x
  2. Step 2: Convert to fraction form
    61,090/91,655.79 = 34,403.74/x
  3. Step 3: Cross multiply
    61,090x = 91,655.79 × 34,403.74
  4. Step 4: Simplify right side
    61,090x = 3,153,301,968.65
  5. Step 5: Solve for x
    x = 3,153,301,968.65/61,090
  6. Step 6: Final answer
    x = 51,617.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.