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Finding the Fourth Proportional to 105,366.84, 145,406.22 and 57,620.22

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Solution

The fourth proportional to 105,366.84, 145,406.22 and 57,620.22 is: 79,515.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,366.84 : 145,406.22 = 57,620.22 : x
  2. Step 2: Convert to fraction form
    105,366.84/145,406.22 = 57,620.22/x
  3. Step 3: Cross multiply
    105,366.84x = 145,406.22 × 57,620.22
  4. Step 4: Simplify right side
    105,366.84x = 8,378,338,385.77
  5. Step 5: Solve for x
    x = 8,378,338,385.77/105,366.84
  6. Step 6: Final answer
    x = 79,515.89

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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.