Home / 142,349.84-196,440.64-78,686.24

Finding the Fourth Proportional to 142,349.84, 196,440.64 and 78,686.24

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Solution

The fourth proportional to 142,349.84, 196,440.64 and 78,686.24 is: 108,585.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,349.84 : 196,440.64 = 78,686.24 : x
  2. Step 2: Convert to fraction form
    142,349.84/196,440.64 = 78,686.24/x
  3. Step 3: Cross multiply
    142,349.84x = 196,440.64 × 78,686.24
  4. Step 4: Simplify right side
    142,349.84x = 15,457,175,344.79
  5. Step 5: Solve for x
    x = 15,457,175,344.79/142,349.84
  6. Step 6: Final answer
    x = 108,585.83

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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.