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Finding the Fourth Proportional to 207,312.88, 286,134.60 and 135,559.60

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Solution

The fourth proportional to 207,312.88, 286,134.60 and 135,559.60 is: 187,100.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,312.88 : 286,134.60 = 135,559.60 : x
  2. Step 2: Convert to fraction form
    207,312.88/286,134.60 = 135,559.60/x
  3. Step 3: Cross multiply
    207,312.88x = 286,134.60 × 135,559.60
  4. Step 4: Simplify right side
    207,312.88x = 38,788,291,922.16
  5. Step 5: Solve for x
    x = 38,788,291,922.16/207,312.88
  6. Step 6: Final answer
    x = 187,100.25

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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.