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Finding the Fourth Proportional to 134,590.60, 201,642.90 and 78,384.70

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Solution

The fourth proportional to 134,590.60, 201,642.90 and 78,384.70 is: 117,435.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,590.60 : 201,642.90 = 78,384.70 : x
  2. Step 2: Convert to fraction form
    134,590.60/201,642.90 = 78,384.70/x
  3. Step 3: Cross multiply
    134,590.60x = 201,642.90 × 78,384.70
  4. Step 4: Simplify right side
    134,590.60x = 15,805,718,223.63
  5. Step 5: Solve for x
    x = 15,805,718,223.63/134,590.60
  6. Step 6: Final answer
    x = 117,435.53

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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.