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Finding the Fourth Proportional to 126,038.40, 189,057.60 and 70,051.20

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Solution

The fourth proportional to 126,038.40, 189,057.60 and 70,051.20 is: 105,076.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,038.40 : 189,057.60 = 70,051.20 : x
  2. Step 2: Convert to fraction form
    126,038.40/189,057.60 = 70,051.20/x
  3. Step 3: Cross multiply
    126,038.40x = 189,057.60 × 70,051.20
  4. Step 4: Simplify right side
    126,038.40x = 13,243,711,749.12
  5. Step 5: Solve for x
    x = 13,243,711,749.12/126,038.40
  6. Step 6: Final answer
    x = 105,076.80

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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.