Home / 210,689.76-290,946.96-135,370.56

Finding the Fourth Proportional to 210,689.76, 290,946.96 and 135,370.56

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Solution

The fourth proportional to 210,689.76, 290,946.96 and 135,370.56 is: 186,936.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,689.76 : 290,946.96 = 135,370.56 : x
  2. Step 2: Convert to fraction form
    210,689.76/290,946.96 = 135,370.56/x
  3. Step 3: Cross multiply
    210,689.76x = 290,946.96 × 135,370.56
  4. Step 4: Simplify right side
    210,689.76x = 39,385,652,905.50
  5. Step 5: Solve for x
    x = 39,385,652,905.50/210,689.76
  6. Step 6: Final answer
    x = 186,936.72

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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.