Home / 142,263.95-196,328.21-78,605.84

Finding the Fourth Proportional to 142,263.95, 196,328.21 and 78,605.84

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Solution

The fourth proportional to 142,263.95, 196,328.21 and 78,605.84 is: 108,478.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,263.95 : 196,328.21 = 78,605.84 : x
  2. Step 2: Convert to fraction form
    142,263.95/196,328.21 = 78,605.84/x
  3. Step 3: Cross multiply
    142,263.95x = 196,328.21 × 78,605.84
  4. Step 4: Simplify right side
    142,263.95x = 15,432,543,960.54
  5. Step 5: Solve for x
    x = 15,432,543,960.54/142,263.95
  6. Step 6: Final answer
    x = 108,478.25

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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.