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Finding the Fourth Proportional to 115,367.76, 159,210.36 and 65,070

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Solution

The fourth proportional to 115,367.76, 159,210.36 and 65,070 is: 89,798.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,367.76 : 159,210.36 = 65,070 : x
  2. Step 2: Convert to fraction form
    115,367.76/159,210.36 = 65,070/x
  3. Step 3: Cross multiply
    115,367.76x = 159,210.36 × 65,070
  4. Step 4: Simplify right side
    115,367.76x = 10,359,818,125.20
  5. Step 5: Solve for x
    x = 10,359,818,125.20/115,367.76
  6. Step 6: Final answer
    x = 89,798.21

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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.