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Finding the Fourth Proportional to 76,369.84, 105,386.60 and 42,377.92

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Solution

The fourth proportional to 76,369.84, 105,386.60 and 42,377.92 is: 58,479.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,369.84 : 105,386.60 = 42,377.92 : x
  2. Step 2: Convert to fraction form
    76,369.84/105,386.60 = 42,377.92/x
  3. Step 3: Cross multiply
    76,369.84x = 105,386.60 × 42,377.92
  4. Step 4: Simplify right side
    76,369.84x = 4,466,064,746.35
  5. Step 5: Solve for x
    x = 4,466,064,746.35/76,369.84
  6. Step 6: Final answer
    x = 58,479.43

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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.