Home / 142,347.99-196,440.27-78,685.77

Finding the Fourth Proportional to 142,347.99, 196,440.27 and 78,685.77

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Solution

The fourth proportional to 142,347.99, 196,440.27 and 78,685.77 is: 108,586.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,347.99 : 196,440.27 = 78,685.77 : x
  2. Step 2: Convert to fraction form
    142,347.99/196,440.27 = 78,685.77/x
  3. Step 3: Cross multiply
    142,347.99x = 196,440.27 × 78,685.77
  4. Step 4: Simplify right side
    142,347.99x = 15,457,053,903.96
  5. Step 5: Solve for x
    x = 15,457,053,903.96/142,347.99
  6. Step 6: Final answer
    x = 108,586.39

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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.