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Finding the Fourth Proportional to 105,491.66, 145,578.48 and 57,745.04

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Solution

The fourth proportional to 105,491.66, 145,578.48 and 57,745.04 is: 79,688.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,491.66 : 145,578.48 = 57,745.04 : x
  2. Step 2: Convert to fraction form
    105,491.66/145,578.48 = 57,745.04/x
  3. Step 3: Cross multiply
    105,491.66x = 145,578.48 × 57,745.04
  4. Step 4: Simplify right side
    105,491.66x = 8,406,435,150.74
  5. Step 5: Solve for x
    x = 8,406,435,150.74/105,491.66
  6. Step 6: Final answer
    x = 79,688.15

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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.