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Finding the Fourth Proportional to 78,887.58, 108,860.79 and 43,070.68

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Solution

The fourth proportional to 78,887.58, 108,860.79 and 43,070.68 is: 59,435.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,887.58 : 108,860.79 = 43,070.68 : x
  2. Step 2: Convert to fraction form
    78,887.58/108,860.79 = 43,070.68/x
  3. Step 3: Cross multiply
    78,887.58x = 108,860.79 × 43,070.68
  4. Step 4: Simplify right side
    78,887.58x = 4,688,708,250.64
  5. Step 5: Solve for x
    x = 4,688,708,250.64/78,887.58
  6. Step 6: Final answer
    x = 59,435.32

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1.5x scale

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.