Home / 77,276.70-115,915.05-53,430.30

Finding the Fourth Proportional to 77,276.70, 115,915.05 and 53,430.30

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Solution

The fourth proportional to 77,276.70, 115,915.05 and 53,430.30 is: 80,145.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,276.70 : 115,915.05 = 53,430.30 : x
  2. Step 2: Convert to fraction form
    77,276.70/115,915.05 = 53,430.30/x
  3. Step 3: Cross multiply
    77,276.70x = 115,915.05 × 53,430.30
  4. Step 4: Simplify right side
    77,276.70x = 6,193,375,896.02
  5. Step 5: Solve for x
    x = 6,193,375,896.02/77,276.70
  6. Step 6: Final answer
    x = 80,145.45

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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.