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Finding the Fourth Proportional to 170,318.79, 235,040 and 98,740.31

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Solution

The fourth proportional to 170,318.79, 235,040 and 98,740.31 is: 136,261.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,318.79 : 235,040 = 98,740.31 : x
  2. Step 2: Convert to fraction form
    170,318.79/235,040 = 98,740.31/x
  3. Step 3: Cross multiply
    170,318.79x = 235,040 × 98,740.31
  4. Step 4: Simplify right side
    170,318.79x = 23,207,922,462.40
  5. Step 5: Solve for x
    x = 23,207,922,462.40/170,318.79
  6. Step 6: Final answer
    x = 136,261.67

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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.