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Finding the Fourth Proportional to 126,639, 174,762 and 70,054.20

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Solution

The fourth proportional to 126,639, 174,762 and 70,054.20 is: 96,674.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,639 : 174,762 = 70,054.20 : x
  2. Step 2: Convert to fraction form
    126,639/174,762 = 70,054.20/x
  3. Step 3: Cross multiply
    126,639x = 174,762 × 70,054.20
  4. Step 4: Simplify right side
    126,639x = 12,242,812,100.40
  5. Step 5: Solve for x
    x = 12,242,812,100.40/126,639
  6. Step 6: Final answer
    x = 96,674.90

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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.