Home / 126,078.40-189,117.60-70,667.20

Finding the Fourth Proportional to 126,078.40, 189,117.60 and 70,667.20

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Solution

The fourth proportional to 126,078.40, 189,117.60 and 70,667.20 is: 106,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,078.40 : 189,117.60 = 70,667.20 : x
  2. Step 2: Convert to fraction form
    126,078.40/189,117.60 = 70,667.20/x
  3. Step 3: Cross multiply
    126,078.40x = 189,117.60 × 70,667.20
  4. Step 4: Simplify right side
    126,078.40x = 13,364,411,262.72
  5. Step 5: Solve for x
    x = 13,364,411,262.72/126,078.40
  6. Step 6: Final answer
    x = 106,000.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.