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Finding the Fourth Proportional to 91,317.81, 125,937 and 57,329.47

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Solution

The fourth proportional to 91,317.81, 125,937 and 57,329.47 is: 79,063.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,317.81 : 125,937 = 57,329.47 : x
  2. Step 2: Convert to fraction form
    91,317.81/125,937 = 57,329.47/x
  3. Step 3: Cross multiply
    91,317.81x = 125,937 × 57,329.47
  4. Step 4: Simplify right side
    91,317.81x = 7,219,901,620.81
  5. Step 5: Solve for x
    x = 7,219,901,620.81/91,317.81
  6. Step 6: Final answer
    x = 79,063.45

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1.5x scale

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.