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Finding the Fourth Proportional to 78,948.63, 118,210.74 and 60,139.07

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Solution

The fourth proportional to 78,948.63, 118,210.74 and 60,139.07 is: 90,046.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,948.63 : 118,210.74 = 60,139.07 : x
  2. Step 2: Convert to fraction form
    78,948.63/118,210.74 = 60,139.07/x
  3. Step 3: Cross multiply
    78,948.63x = 118,210.74 × 60,139.07
  4. Step 4: Simplify right side
    78,948.63x = 7,109,083,376.56
  5. Step 5: Solve for x
    x = 7,109,083,376.56/78,948.63
  6. Step 6: Final answer
    x = 90,046.95

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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.