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Finding the Fourth Proportional to 77,040.84, 106,312.80 and 45,237

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Solution

The fourth proportional to 77,040.84, 106,312.80 and 45,237 is: 62,424.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,040.84 : 106,312.80 = 45,237 : x
  2. Step 2: Convert to fraction form
    77,040.84/106,312.80 = 45,237/x
  3. Step 3: Cross multiply
    77,040.84x = 106,312.80 × 45,237
  4. Step 4: Simplify right side
    77,040.84x = 4,809,272,133.60
  5. Step 5: Solve for x
    x = 4,809,272,133.60/77,040.84
  6. Step 6: Final answer
    x = 62,424.97

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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.