Home / 142,475.13-196,617.78-78,812.64

Finding the Fourth Proportional to 142,475.13, 196,617.78 and 78,812.64

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Solution

The fourth proportional to 142,475.13, 196,617.78 and 78,812.64 is: 108,762.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,475.13 : 196,617.78 = 78,812.64 : x
  2. Step 2: Convert to fraction form
    142,475.13/196,617.78 = 78,812.64/x
  3. Step 3: Cross multiply
    142,475.13x = 196,617.78 × 78,812.64
  4. Step 4: Simplify right side
    142,475.13x = 15,495,966,312.74
  5. Step 5: Solve for x
    x = 15,495,966,312.74/142,475.13
  6. Step 6: Final answer
    x = 108,762.61

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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.