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Finding the Fourth Proportional to 210,457.80, 290,431.69 and 113,661.68

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Solution

The fourth proportional to 210,457.80, 290,431.69 and 113,661.68 is: 156,853.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,457.80 : 290,431.69 = 113,661.68 : x
  2. Step 2: Convert to fraction form
    210,457.80/290,431.69 = 113,661.68/x
  3. Step 3: Cross multiply
    210,457.80x = 290,431.69 × 113,661.68
  4. Step 4: Simplify right side
    210,457.80x = 33,010,953,363.42
  5. Step 5: Solve for x
    x = 33,010,953,363.42/210,457.80
  6. Step 6: Final answer
    x = 156,853.07

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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.