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Finding the Fourth Proportional to 98,378.60, 147,568.71 and 61,047.32

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Solution

The fourth proportional to 98,378.60, 147,568.71 and 61,047.32 is: 91,571.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,378.60 : 147,568.71 = 61,047.32 : x
  2. Step 2: Convert to fraction form
    98,378.60/147,568.71 = 61,047.32/x
  3. Step 3: Cross multiply
    98,378.60x = 147,568.71 × 61,047.32
  4. Step 4: Simplify right side
    98,378.60x = 9,008,674,261.36
  5. Step 5: Solve for x
    x = 9,008,674,261.36/98,378.60
  6. Step 6: Final answer
    x = 91,571.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.