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Finding the Fourth Proportional to 104,308.48, 143,852.80 and 81,913.60

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Solution

The fourth proportional to 104,308.48, 143,852.80 and 81,913.60 is: 112,967.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,308.48 : 143,852.80 = 81,913.60 : x
  2. Step 2: Convert to fraction form
    104,308.48/143,852.80 = 81,913.60/x
  3. Step 3: Cross multiply
    104,308.48x = 143,852.80 × 81,913.60
  4. Step 4: Simplify right side
    104,308.48x = 11,783,500,718.08
  5. Step 5: Solve for x
    x = 11,783,500,718.08/104,308.48
  6. Step 6: Final answer
    x = 112,967.81

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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.