Home / 105,311.28-145,329.56-57,564.82

Finding the Fourth Proportional to 105,311.28, 145,329.56 and 57,564.82

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Solution

The fourth proportional to 105,311.28, 145,329.56 and 57,564.82 is: 79,439.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,311.28 : 145,329.56 = 57,564.82 : x
  2. Step 2: Convert to fraction form
    105,311.28/145,329.56 = 57,564.82/x
  3. Step 3: Cross multiply
    105,311.28x = 145,329.56 × 57,564.82
  4. Step 4: Simplify right side
    105,311.28x = 8,365,869,962.08
  5. Step 5: Solve for x
    x = 8,365,869,962.08/105,311.28
  6. Step 6: Final answer
    x = 79,439.45

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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.