Home / 129,569.34-178,811.22-72,208.74

Finding the Fourth Proportional to 129,569.34, 178,811.22 and 72,208.74

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Solution

The fourth proportional to 129,569.34, 178,811.22 and 72,208.74 is: 99,651.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,569.34 : 178,811.22 = 72,208.74 : x
  2. Step 2: Convert to fraction form
    129,569.34/178,811.22 = 72,208.74/x
  3. Step 3: Cross multiply
    129,569.34x = 178,811.22 × 72,208.74
  4. Step 4: Simplify right side
    129,569.34x = 12,911,732,894.06
  5. Step 5: Solve for x
    x = 12,911,732,894.06/129,569.34
  6. Step 6: Final answer
    x = 99,651.14

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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.