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Finding the Fourth Proportional to 115,643.52, 159,605.28 and 70,328.88

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Solution

The fourth proportional to 115,643.52, 159,605.28 and 70,328.88 is: 97,064.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,643.52 : 159,605.28 = 70,328.88 : x
  2. Step 2: Convert to fraction form
    115,643.52/159,605.28 = 70,328.88/x
  3. Step 3: Cross multiply
    115,643.52x = 159,605.28 × 70,328.88
  4. Step 4: Simplify right side
    115,643.52x = 11,224,860,584.49
  5. Step 5: Solve for x
    x = 11,224,860,584.49/115,643.52
  6. Step 6: Final answer
    x = 97,064.33

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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.