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Finding the Fourth Proportional to 139,980.74, 210,058.20 and 56,874.74

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Solution

The fourth proportional to 139,980.74, 210,058.20 and 56,874.74 is: 85,347.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,980.74 : 210,058.20 = 56,874.74 : x
  2. Step 2: Convert to fraction form
    139,980.74/210,058.20 = 56,874.74/x
  3. Step 3: Cross multiply
    139,980.74x = 210,058.20 × 56,874.74
  4. Step 4: Simplify right side
    139,980.74x = 11,947,004,459.58
  5. Step 5: Solve for x
    x = 11,947,004,459.58/139,980.74
  6. Step 6: Final answer
    x = 85,347.49

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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.