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Finding the Fourth Proportional to 65,430.25, 90,293.75 and 35,622.25

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Solution

The fourth proportional to 65,430.25, 90,293.75 and 35,622.25 is: 49,158.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,430.25 : 90,293.75 = 35,622.25 : x
  2. Step 2: Convert to fraction form
    65,430.25/90,293.75 = 35,622.25/x
  3. Step 3: Cross multiply
    65,430.25x = 90,293.75 × 35,622.25
  4. Step 4: Simplify right side
    65,430.25x = 3,216,466,535.94
  5. Step 5: Solve for x
    x = 3,216,466,535.94/65,430.25
  6. Step 6: Final answer
    x = 49,158.71

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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.