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Finding the Fourth Proportional to 112,518.64, 155,291.16 and 67,798

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Solution

The fourth proportional to 112,518.64, 155,291.16 and 67,798 is: 93,570.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,518.64 : 155,291.16 = 67,798 : x
  2. Step 2: Convert to fraction form
    112,518.64/155,291.16 = 67,798/x
  3. Step 3: Cross multiply
    112,518.64x = 155,291.16 × 67,798
  4. Step 4: Simplify right side
    112,518.64x = 10,528,430,065.68
  5. Step 5: Solve for x
    x = 10,528,430,065.68/112,518.64
  6. Step 6: Final answer
    x = 93,570.54

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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.