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Finding the Fourth Proportional to 98,313.49, 135,684.15 and 55,878.40

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Solution

The fourth proportional to 98,313.49, 135,684.15 and 55,878.40 is: 77,118.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,313.49 : 135,684.15 = 55,878.40 : x
  2. Step 2: Convert to fraction form
    98,313.49/135,684.15 = 55,878.40/x
  3. Step 3: Cross multiply
    98,313.49x = 135,684.15 × 55,878.40
  4. Step 4: Simplify right side
    98,313.49x = 7,581,812,528.94
  5. Step 5: Solve for x
    x = 7,581,812,528.94/98,313.49
  6. Step 6: Final answer
    x = 77,118.74

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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.