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Finding the Fourth Proportional to 132,915, 183,420.18 and 72,486.12

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Solution

The fourth proportional to 132,915, 183,420.18 and 72,486.12 is: 100,029.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,915 : 183,420.18 = 72,486.12 : x
  2. Step 2: Convert to fraction form
    132,915/183,420.18 = 72,486.12/x
  3. Step 3: Cross multiply
    132,915x = 183,420.18 × 72,486.12
  4. Step 4: Simplify right side
    132,915x = 13,295,417,177.90
  5. Step 5: Solve for x
    x = 13,295,417,177.90/132,915
  6. Step 6: Final answer
    x = 100,029.47

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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.