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Finding the Fourth Proportional to 230,780.25, 318,477.15 and 130,178.25

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Solution

The fourth proportional to 230,780.25, 318,477.15 and 130,178.25 is: 179,646.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,780.25 : 318,477.15 = 130,178.25 : x
  2. Step 2: Convert to fraction form
    230,780.25/318,477.15 = 130,178.25/x
  3. Step 3: Cross multiply
    230,780.25x = 318,477.15 × 130,178.25
  4. Step 4: Simplify right side
    230,780.25x = 41,458,798,051.99
  5. Step 5: Solve for x
    x = 41,458,798,051.99/230,780.25
  6. Step 6: Final answer
    x = 179,646.21

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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.