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Finding the Fourth Proportional to 91,147.94, 125,750.93 and 56,690.40

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Solution

The fourth proportional to 91,147.94, 125,750.93 and 56,690.40 is: 78,212.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,147.94 : 125,750.93 = 56,690.40 : x
  2. Step 2: Convert to fraction form
    91,147.94/125,750.93 = 56,690.40/x
  3. Step 3: Cross multiply
    91,147.94x = 125,750.93 × 56,690.40
  4. Step 4: Simplify right side
    91,147.94x = 7,128,870,238.62
  5. Step 5: Solve for x
    x = 7,128,870,238.62/91,147.94
  6. Step 6: Final answer
    x = 78,212.09

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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.