Home / 138,543.21-191,189.34-74,880.86

Finding the Fourth Proportional to 138,543.21, 191,189.34 and 74,880.86

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Solution

The fourth proportional to 138,543.21, 191,189.34 and 74,880.86 is: 103,335.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,543.21 : 191,189.34 = 74,880.86 : x
  2. Step 2: Convert to fraction form
    138,543.21/191,189.34 = 74,880.86/x
  3. Step 3: Cross multiply
    138,543.21x = 191,189.34 × 74,880.86
  4. Step 4: Simplify right side
    138,543.21x = 14,316,421,246.09
  5. Step 5: Solve for x
    x = 14,316,421,246.09/138,543.21
  6. Step 6: Final answer
    x = 103,335.42

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1.5x scale

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.