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Finding the Fourth Proportional to 98,419.81, 147,407.76 and 45,718.39

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Solution

The fourth proportional to 98,419.81, 147,407.76 and 45,718.39 is: 68,474.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,419.81 : 147,407.76 = 45,718.39 : x
  2. Step 2: Convert to fraction form
    98,419.81/147,407.76 = 45,718.39/x
  3. Step 3: Cross multiply
    98,419.81x = 147,407.76 × 45,718.39
  4. Step 4: Simplify right side
    98,419.81x = 6,739,245,460.71
  5. Step 5: Solve for x
    x = 6,739,245,460.71/98,419.81
  6. Step 6: Final answer
    x = 68,474.48

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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.