Home / 129,428.83-178,611.34-72,068.84

Finding the Fourth Proportional to 129,428.83, 178,611.34 and 72,068.84

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Solution

The fourth proportional to 129,428.83, 178,611.34 and 72,068.84 is: 99,454.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,428.83 : 178,611.34 = 72,068.84 : x
  2. Step 2: Convert to fraction form
    129,428.83/178,611.34 = 72,068.84/x
  3. Step 3: Cross multiply
    129,428.83x = 178,611.34 × 72,068.84
  4. Step 4: Simplify right side
    129,428.83x = 12,872,312,084.65
  5. Step 5: Solve for x
    x = 12,872,312,084.65/129,428.83
  6. Step 6: Final answer
    x = 99,454.75

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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.