Home / 210,783.15-290,887.67-115,289.82

Finding the Fourth Proportional to 210,783.15, 290,887.67 and 115,289.82

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Solution

The fourth proportional to 210,783.15, 290,887.67 and 115,289.82 is: 159,103.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,783.15 : 290,887.67 = 115,289.82 : x
  2. Step 2: Convert to fraction form
    210,783.15/290,887.67 = 115,289.82/x
  3. Step 3: Cross multiply
    210,783.15x = 290,887.67 × 115,289.82
  4. Step 4: Simplify right side
    210,783.15x = 33,536,387,402.74
  5. Step 5: Solve for x
    x = 33,536,387,402.74/210,783.15
  6. Step 6: Final answer
    x = 159,103.74

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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.