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Finding the Fourth Proportional to 91,838.60, 137,495.10 and 56,540.60

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Solution

The fourth proportional to 91,838.60, 137,495.10 and 56,540.60 is: 84,649.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,838.60 : 137,495.10 = 56,540.60 : x
  2. Step 2: Convert to fraction form
    91,838.60/137,495.10 = 56,540.60/x
  3. Step 3: Cross multiply
    91,838.60x = 137,495.10 × 56,540.60
  4. Step 4: Simplify right side
    91,838.60x = 7,774,055,451.06
  5. Step 5: Solve for x
    x = 7,774,055,451.06/91,838.60
  6. Step 6: Final answer
    x = 84,649.11

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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.