Home / 142,166.23-196,186.77-78,502.66

Finding the Fourth Proportional to 142,166.23, 196,186.77 and 78,502.66

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Solution

The fourth proportional to 142,166.23, 196,186.77 and 78,502.66 is: 108,332.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,166.23 : 196,186.77 = 78,502.66 : x
  2. Step 2: Convert to fraction form
    142,166.23/196,186.77 = 78,502.66/x
  3. Step 3: Cross multiply
    142,166.23x = 196,186.77 × 78,502.66
  4. Step 4: Simplify right side
    142,166.23x = 15,401,183,301.81
  5. Step 5: Solve for x
    x = 15,401,183,301.81/142,166.23
  6. Step 6: Final answer
    x = 108,332.22

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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.