Home / 116,656.50-161,035.73-78,438.20

Finding the Fourth Proportional to 116,656.50, 161,035.73 and 78,438.20

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Solution

The fourth proportional to 116,656.50, 161,035.73 and 78,438.20 is: 108,278.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,656.50 : 161,035.73 = 78,438.20 : x
  2. Step 2: Convert to fraction form
    116,656.50/161,035.73 = 78,438.20/x
  3. Step 3: Cross multiply
    116,656.50x = 161,035.73 × 78,438.20
  4. Step 4: Simplify right side
    116,656.50x = 12,631,352,894.93
  5. Step 5: Solve for x
    x = 12,631,352,894.93/116,656.50
  6. Step 6: Final answer
    x = 108,278.17

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1.5x scale

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.