Home / 142,078.79-196,068.32-78,416.13

Finding the Fourth Proportional to 142,078.79, 196,068.32 and 78,416.13

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Solution

The fourth proportional to 142,078.79, 196,068.32 and 78,416.13 is: 108,214.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,078.79 : 196,068.32 = 78,416.13 : x
  2. Step 2: Convert to fraction form
    142,078.79/196,068.32 = 78,416.13/x
  3. Step 3: Cross multiply
    142,078.79x = 196,068.32 × 78,416.13
  4. Step 4: Simplify right side
    142,078.79x = 15,374,917,889.66
  5. Step 5: Solve for x
    x = 15,374,917,889.66/142,078.79
  6. Step 6: Final answer
    x = 108,214.03

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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.