Home / 142,320.54-196,390.53-78,658.32

Finding the Fourth Proportional to 142,320.54, 196,390.53 and 78,658.32

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Solution

The fourth proportional to 142,320.54, 196,390.53 and 78,658.32 is: 108,541.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,320.54 : 196,390.53 = 78,658.32 : x
  2. Step 2: Convert to fraction form
    142,320.54/196,390.53 = 78,658.32/x
  3. Step 3: Cross multiply
    142,320.54x = 196,390.53 × 78,658.32
  4. Step 4: Simplify right side
    142,320.54x = 15,447,749,153.71
  5. Step 5: Solve for x
    x = 15,447,749,153.71/142,320.54
  6. Step 6: Final answer
    x = 108,541.95

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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.