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Finding the Fourth Proportional to 91,791.10, 137,686.65 and 52,352.20

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Solution

The fourth proportional to 91,791.10, 137,686.65 and 52,352.20 is: 78,528.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,791.10 : 137,686.65 = 52,352.20 : x
  2. Step 2: Convert to fraction form
    91,791.10/137,686.65 = 52,352.20/x
  3. Step 3: Cross multiply
    91,791.10x = 137,686.65 × 52,352.20
  4. Step 4: Simplify right side
    91,791.10x = 7,208,199,038.13
  5. Step 5: Solve for x
    x = 7,208,199,038.13/91,791.10
  6. Step 6: Final answer
    x = 78,528.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.