Home / 142,312.95-196,389.63-78,651.81

Finding the Fourth Proportional to 142,312.95, 196,389.63 and 78,651.81

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Solution

The fourth proportional to 142,312.95, 196,389.63 and 78,651.81 is: 108,538.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,312.95 : 196,389.63 = 78,651.81 : x
  2. Step 2: Convert to fraction form
    142,312.95/196,389.63 = 78,651.81/x
  3. Step 3: Cross multiply
    142,312.95x = 196,389.63 × 78,651.81
  4. Step 4: Simplify right side
    142,312.95x = 15,446,399,864.73
  5. Step 5: Solve for x
    x = 15,446,399,864.73/142,312.95
  6. Step 6: Final answer
    x = 108,538.26

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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.