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Finding the Fourth Proportional to 115,109.73, 158,875.94 and 77,362.11

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Solution

The fourth proportional to 115,109.73, 158,875.94 and 77,362.11 is: 106,776.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,109.73 : 158,875.94 = 77,362.11 : x
  2. Step 2: Convert to fraction form
    115,109.73/158,875.94 = 77,362.11/x
  3. Step 3: Cross multiply
    115,109.73x = 158,875.94 × 77,362.11
  4. Step 4: Simplify right side
    115,109.73x = 12,290,977,946.63
  5. Step 5: Solve for x
    x = 12,290,977,946.63/115,109.73
  6. Step 6: Final answer
    x = 106,776.19

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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.