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Finding the Fourth Proportional to 100,878.54, 139,210.74 and 60,071.10

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Solution

The fourth proportional to 100,878.54, 139,210.74 and 60,071.10 is: 82,897.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,878.54 : 139,210.74 = 60,071.10 : x
  2. Step 2: Convert to fraction form
    100,878.54/139,210.74 = 60,071.10/x
  3. Step 3: Cross multiply
    100,878.54x = 139,210.74 × 60,071.10
  4. Step 4: Simplify right side
    100,878.54x = 8,362,542,283.61
  5. Step 5: Solve for x
    x = 8,362,542,283.61/100,878.54
  6. Step 6: Final answer
    x = 82,897.14

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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.