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Finding the Fourth Proportional to 76,801.20, 115,131.60 and 65,030.76

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Solution

The fourth proportional to 76,801.20, 115,131.60 and 65,030.76 is: 97,486.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,801.20 : 115,131.60 = 65,030.76 : x
  2. Step 2: Convert to fraction form
    76,801.20/115,131.60 = 65,030.76/x
  3. Step 3: Cross multiply
    76,801.20x = 115,131.60 × 65,030.76
  4. Step 4: Simplify right side
    76,801.20x = 7,487,095,448.02
  5. Step 5: Solve for x
    x = 7,487,095,448.02/76,801.20
  6. Step 6: Final answer
    x = 97,486.70

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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.