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Finding the Fourth Proportional to 112,510, 155,391.36 and 76,637.80

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Solution

The fourth proportional to 112,510, 155,391.36 and 76,637.80 is: 105,847.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,510 : 155,391.36 = 76,637.80 : x
  2. Step 2: Convert to fraction form
    112,510/155,391.36 = 76,637.80/x
  3. Step 3: Cross multiply
    112,510x = 155,391.36 × 76,637.80
  4. Step 4: Simplify right side
    112,510x = 11,908,851,969.41
  5. Step 5: Solve for x
    x = 11,908,851,969.41/112,510
  6. Step 6: Final answer
    x = 105,847.05

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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.