Home / 129,587.98-178,830.04-72,999.22

Finding the Fourth Proportional to 129,587.98, 178,830.04 and 72,999.22

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Solution

The fourth proportional to 129,587.98, 178,830.04 and 72,999.22 is: 100,738.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,587.98 : 178,830.04 = 72,999.22 : x
  2. Step 2: Convert to fraction form
    129,587.98/178,830.04 = 72,999.22/x
  3. Step 3: Cross multiply
    129,587.98x = 178,830.04 × 72,999.22
  4. Step 4: Simplify right side
    129,587.98x = 13,054,453,432.57
  5. Step 5: Solve for x
    x = 13,054,453,432.57/129,587.98
  6. Step 6: Final answer
    x = 100,738.15

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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.