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Finding the Fourth Proportional to 76,640.80, 115,681.05 and 76,640.80

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Solution

The fourth proportional to 76,640.80, 115,681.05 and 76,640.80 is: 115,681.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,640.80 : 115,681.05 = 76,640.80 : x
  2. Step 2: Convert to fraction form
    76,640.80/115,681.05 = 76,640.80/x
  3. Step 3: Cross multiply
    76,640.80x = 115,681.05 × 76,640.80
  4. Step 4: Simplify right side
    76,640.80x = 8,865,888,216.84
  5. Step 5: Solve for x
    x = 8,865,888,216.84/76,640.80
  6. Step 6: Final answer
    x = 115,681.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.