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Finding the Fourth Proportional to 124,693.74, 172,074.87 and 70,977.60

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Solution

The fourth proportional to 124,693.74, 172,074.87 and 70,977.60 is: 97,947.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,693.74 : 172,074.87 = 70,977.60 : x
  2. Step 2: Convert to fraction form
    124,693.74/172,074.87 = 70,977.60/x
  3. Step 3: Cross multiply
    124,693.74x = 172,074.87 × 70,977.60
  4. Step 4: Simplify right side
    124,693.74x = 12,213,461,292.91
  5. Step 5: Solve for x
    x = 12,213,461,292.91/124,693.74
  6. Step 6: Final answer
    x = 97,947.67

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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.