Home / 155,999.32-215,279.10-84,379.32

Finding the Fourth Proportional to 155,999.32, 215,279.10 and 84,379.32

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Solution

The fourth proportional to 155,999.32, 215,279.10 and 84,379.32 is: 116,443.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,999.32 : 215,279.10 = 84,379.32 : x
  2. Step 2: Convert to fraction form
    155,999.32/215,279.10 = 84,379.32/x
  3. Step 3: Cross multiply
    155,999.32x = 215,279.10 × 84,379.32
  4. Step 4: Simplify right side
    155,999.32x = 18,165,104,068.21
  5. Step 5: Solve for x
    x = 18,165,104,068.21/155,999.32
  6. Step 6: Final answer
    x = 116,443.48

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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.