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Finding the Fourth Proportional to 91,521.70, 137,322.95 and 31,559.32

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Solution

The fourth proportional to 91,521.70, 137,322.95 and 31,559.32 is: 47,352.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,521.70 : 137,322.95 = 31,559.32 : x
  2. Step 2: Convert to fraction form
    91,521.70/137,322.95 = 31,559.32/x
  3. Step 3: Cross multiply
    91,521.70x = 137,322.95 × 31,559.32
  4. Step 4: Simplify right side
    91,521.70x = 4,333,818,936.25
  5. Step 5: Solve for x
    x = 4,333,818,936.25/91,521.70
  6. Step 6: Final answer
    x = 47,352.91

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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.