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Finding the Fourth Proportional to 188,013.50, 259,458.63 and 103,130.76

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Solution

The fourth proportional to 188,013.50, 259,458.63 and 103,130.76 is: 142,320.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,013.50 : 259,458.63 = 103,130.76 : x
  2. Step 2: Convert to fraction form
    188,013.50/259,458.63 = 103,130.76/x
  3. Step 3: Cross multiply
    188,013.50x = 259,458.63 × 103,130.76
  4. Step 4: Simplify right side
    188,013.50x = 26,758,165,700.46
  5. Step 5: Solve for x
    x = 26,758,165,700.46/188,013.50
  6. Step 6: Final answer
    x = 142,320.45

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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.