Home / 142,389.95-196,502.09-78,731.87

Finding the Fourth Proportional to 142,389.95, 196,502.09 and 78,731.87

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Solution

The fourth proportional to 142,389.95, 196,502.09 and 78,731.87 is: 108,652.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,389.95 : 196,502.09 = 78,731.87 : x
  2. Step 2: Convert to fraction form
    142,389.95/196,502.09 = 78,731.87/x
  3. Step 3: Cross multiply
    142,389.95x = 196,502.09 × 78,731.87
  4. Step 4: Simplify right side
    142,389.95x = 15,470,975,628.44
  5. Step 5: Solve for x
    x = 15,470,975,628.44/142,389.95
  6. Step 6: Final answer
    x = 108,652.16

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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.