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Finding the Fourth Proportional to 78,855.64, 108,804.52 and 45,315.16

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Solution

The fourth proportional to 78,855.64, 108,804.52 and 45,315.16 is: 62,525.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,855.64 : 108,804.52 = 45,315.16 : x
  2. Step 2: Convert to fraction form
    78,855.64/108,804.52 = 45,315.16/x
  3. Step 3: Cross multiply
    78,855.64x = 108,804.52 × 45,315.16
  4. Step 4: Simplify right side
    78,855.64x = 4,930,494,232.52
  5. Step 5: Solve for x
    x = 4,930,494,232.52/78,855.64
  6. Step 6: Final answer
    x = 62,525.57

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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.