Home / 210,780.72-290,894.76-120,165.12

Finding the Fourth Proportional to 210,780.72, 290,894.76 and 120,165.12

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Solution

The fourth proportional to 210,780.72, 290,894.76 and 120,165.12 is: 165,837.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,780.72 : 290,894.76 = 120,165.12 : x
  2. Step 2: Convert to fraction form
    210,780.72/290,894.76 = 120,165.12/x
  3. Step 3: Cross multiply
    210,780.72x = 290,894.76 × 120,165.12
  4. Step 4: Simplify right side
    210,780.72x = 34,955,403,742.77
  5. Step 5: Solve for x
    x = 34,955,403,742.77/210,780.72
  6. Step 6: Final answer
    x = 165,837.77

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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.