Home / 142,359.12-196,465.50-78,702.84

Finding the Fourth Proportional to 142,359.12, 196,465.50 and 78,702.84

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Solution

The fourth proportional to 142,359.12, 196,465.50 and 78,702.84 is: 108,615.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,359.12 : 196,465.50 = 78,702.84 : x
  2. Step 2: Convert to fraction form
    142,359.12/196,465.50 = 78,702.84/x
  3. Step 3: Cross multiply
    142,359.12x = 196,465.50 × 78,702.84
  4. Step 4: Simplify right side
    142,359.12x = 15,462,392,812.02
  5. Step 5: Solve for x
    x = 15,462,392,812.02/142,359.12
  6. Step 6: Final answer
    x = 108,615.40

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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.