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Finding the Fourth Proportional to 210,862.71, 290,987.96 and 115,368.03

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Solution

The fourth proportional to 210,862.71, 290,987.96 and 115,368.03 is: 159,206.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,862.71 : 290,987.96 = 115,368.03 : x
  2. Step 2: Convert to fraction form
    210,862.71/290,987.96 = 115,368.03/x
  3. Step 3: Cross multiply
    210,862.71x = 290,987.96 × 115,368.03
  4. Step 4: Simplify right side
    210,862.71x = 33,570,707,122.08
  5. Step 5: Solve for x
    x = 33,570,707,122.08/210,862.71
  6. Step 6: Final answer
    x = 159,206.47

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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.