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Finding the Fourth Proportional to 134,875.68, 186,138.48 and 78,295.68

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Solution

The fourth proportional to 134,875.68, 186,138.48 and 78,295.68 is: 108,053.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,875.68 : 186,138.48 = 78,295.68 : x
  2. Step 2: Convert to fraction form
    134,875.68/186,138.48 = 78,295.68/x
  3. Step 3: Cross multiply
    134,875.68x = 186,138.48 × 78,295.68
  4. Step 4: Simplify right side
    134,875.68x = 14,573,838,865.77
  5. Step 5: Solve for x
    x = 14,573,838,865.77/134,875.68
  6. Step 6: Final answer
    x = 108,053.87

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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.