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Finding the Fourth Proportional to 118,515.70, 177,341.55 and 87,411.70

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Solution

The fourth proportional to 118,515.70, 177,341.55 and 87,411.70 is: 130,798.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,515.70 : 177,341.55 = 87,411.70 : x
  2. Step 2: Convert to fraction form
    118,515.70/177,341.55 = 87,411.70/x
  3. Step 3: Cross multiply
    118,515.70x = 177,341.55 × 87,411.70
  4. Step 4: Simplify right side
    118,515.70x = 15,501,726,366.14
  5. Step 5: Solve for x
    x = 15,501,726,366.14/118,515.70
  6. Step 6: Final answer
    x = 130,798.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.