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Finding the Fourth Proportional to 133,142.40, 183,728.45 and 72,701.01

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Solution

The fourth proportional to 133,142.40, 183,728.45 and 72,701.01 is: 100,322.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,142.40 : 183,728.45 = 72,701.01 : x
  2. Step 2: Convert to fraction form
    133,142.40/183,728.45 = 72,701.01/x
  3. Step 3: Cross multiply
    133,142.40x = 183,728.45 × 72,701.01
  4. Step 4: Simplify right side
    133,142.40x = 13,357,244,062.49
  5. Step 5: Solve for x
    x = 13,357,244,062.49/133,142.40
  6. Step 6: Final answer
    x = 100,322.99

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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.