Home / 129,436.47-178,621.95-72,847.85

Finding the Fourth Proportional to 129,436.47, 178,621.95 and 72,847.85

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Solution

The fourth proportional to 129,436.47, 178,621.95 and 72,847.85 is: 100,529.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,436.47 : 178,621.95 = 72,847.85 : x
  2. Step 2: Convert to fraction form
    129,436.47/178,621.95 = 72,847.85/x
  3. Step 3: Cross multiply
    129,436.47x = 178,621.95 × 72,847.85
  4. Step 4: Simplify right side
    129,436.47x = 13,012,224,127.20
  5. Step 5: Solve for x
    x = 13,012,224,127.20/129,436.47
  6. Step 6: Final answer
    x = 100,529.81

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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.