Home / 142,148.64-196,161.37-78,485.07

Finding the Fourth Proportional to 142,148.64, 196,161.37 and 78,485.07

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Solution

The fourth proportional to 142,148.64, 196,161.37 and 78,485.07 is: 108,307.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,148.64 : 196,161.37 = 78,485.07 : x
  2. Step 2: Convert to fraction form
    142,148.64/196,161.37 = 78,485.07/x
  3. Step 3: Cross multiply
    142,148.64x = 196,161.37 × 78,485.07
  4. Step 4: Simplify right side
    142,148.64x = 15,395,738,855.75
  5. Step 5: Solve for x
    x = 15,395,738,855.75/142,148.64
  6. Step 6: Final answer
    x = 108,307.32

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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.