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Finding the Fourth Proportional to 100,529.53, 138,733.08 and 57,513.06

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Solution

The fourth proportional to 100,529.53, 138,733.08 and 57,513.06 is: 79,369.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,529.53 : 138,733.08 = 57,513.06 : x
  2. Step 2: Convert to fraction form
    100,529.53/138,733.08 = 57,513.06/x
  3. Step 3: Cross multiply
    100,529.53x = 138,733.08 × 57,513.06
  4. Step 4: Simplify right side
    100,529.53x = 7,978,963,954.02
  5. Step 5: Solve for x
    x = 7,978,963,954.02/100,529.53
  6. Step 6: Final answer
    x = 79,369.35

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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.