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Finding the Fourth Proportional to 77,670.90, 115,576.07 and 77,408.46

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Solution

The fourth proportional to 77,670.90, 115,576.07 and 77,408.46 is: 115,185.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,670.90 : 115,576.07 = 77,408.46 : x
  2. Step 2: Convert to fraction form
    77,670.90/115,576.07 = 77,408.46/x
  3. Step 3: Cross multiply
    77,670.90x = 115,576.07 × 77,408.46
  4. Step 4: Simplify right side
    77,670.90x = 8,946,565,204.51
  5. Step 5: Solve for x
    x = 8,946,565,204.51/77,670.90
  6. Step 6: Final answer
    x = 115,185.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.