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Finding the Fourth Proportional to 139,276, 192,359.13 and 93,875.74

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Solution

The fourth proportional to 139,276, 192,359.13 and 93,875.74 is: 129,655.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,276 : 192,359.13 = 93,875.74 : x
  2. Step 2: Convert to fraction form
    139,276/192,359.13 = 93,875.74/x
  3. Step 3: Cross multiply
    139,276x = 192,359.13 × 93,875.74
  4. Step 4: Simplify right side
    139,276x = 18,057,855,674.51
  5. Step 5: Solve for x
    x = 18,057,855,674.51/139,276
  6. Step 6: Final answer
    x = 129,655.19

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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.