Home / 142,342.81-196,433.89-77,812.18

Finding the Fourth Proportional to 142,342.81, 196,433.89 and 77,812.18

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Solution

The fourth proportional to 142,342.81, 196,433.89 and 77,812.18 is: 107,381.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,342.81 : 196,433.89 = 77,812.18 : x
  2. Step 2: Convert to fraction form
    142,342.81/196,433.89 = 77,812.18/x
  3. Step 3: Cross multiply
    142,342.81x = 196,433.89 × 77,812.18
  4. Step 4: Simplify right side
    142,342.81x = 15,284,949,206.78
  5. Step 5: Solve for x
    x = 15,284,949,206.78/142,342.81
  6. Step 6: Final answer
    x = 107,381.25

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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.