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Finding the Fourth Proportional to 105,710.84, 145,881 and 57,963.20

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Solution

The fourth proportional to 105,710.84, 145,881 and 57,963.20 is: 79,989.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,710.84 : 145,881 = 57,963.20 : x
  2. Step 2: Convert to fraction form
    105,710.84/145,881 = 57,963.20/x
  3. Step 3: Cross multiply
    105,710.84x = 145,881 × 57,963.20
  4. Step 4: Simplify right side
    105,710.84x = 8,455,729,579.20
  5. Step 5: Solve for x
    x = 8,455,729,579.20/105,710.84
  6. Step 6: Final answer
    x = 79,989.24

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1.5x scale

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.