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Finding the Fourth Proportional to 91,296.90, 136,945.35 and 51,930.90

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Solution

The fourth proportional to 91,296.90, 136,945.35 and 51,930.90 is: 77,896.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,296.90 : 136,945.35 = 51,930.90 : x
  2. Step 2: Convert to fraction form
    91,296.90/136,945.35 = 51,930.90/x
  3. Step 3: Cross multiply
    91,296.90x = 136,945.35 × 51,930.90
  4. Step 4: Simplify right side
    91,296.90x = 7,111,695,276.32
  5. Step 5: Solve for x
    x = 7,111,695,276.32/91,296.90
  6. Step 6: Final answer
    x = 77,896.35

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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.