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Finding the Fourth Proportional to 132,909.76, 183,411.12 and 72,478.72

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Solution

The fourth proportional to 132,909.76, 183,411.12 and 72,478.72 is: 100,018.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,909.76 : 183,411.12 = 72,478.72 : x
  2. Step 2: Convert to fraction form
    132,909.76/183,411.12 = 72,478.72/x
  3. Step 3: Cross multiply
    132,909.76x = 183,411.12 × 72,478.72
  4. Step 4: Simplify right side
    132,909.76x = 13,293,403,211.37
  5. Step 5: Solve for x
    x = 13,293,403,211.37/132,909.76
  6. Step 6: Final answer
    x = 100,018.26

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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.