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Finding the Fourth Proportional to 98,005.60, 135,323.76 and 75,308.68

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Solution

The fourth proportional to 98,005.60, 135,323.76 and 75,308.68 is: 103,984.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,005.60 : 135,323.76 = 75,308.68 : x
  2. Step 2: Convert to fraction form
    98,005.60/135,323.76 = 75,308.68/x
  3. Step 3: Cross multiply
    98,005.60x = 135,323.76 × 75,308.68
  4. Step 4: Simplify right side
    98,005.60x = 10,191,053,738.24
  5. Step 5: Solve for x
    x = 10,191,053,738.24/98,005.60
  6. Step 6: Final answer
    x = 103,984.40

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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.