Home / 138,602.04-191,271.83-78,173.86

Finding the Fourth Proportional to 138,602.04, 191,271.83 and 78,173.86

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Solution

The fourth proportional to 138,602.04, 191,271.83 and 78,173.86 is: 107,880.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,602.04 : 191,271.83 = 78,173.86 : x
  2. Step 2: Convert to fraction form
    138,602.04/191,271.83 = 78,173.86/x
  3. Step 3: Cross multiply
    138,602.04x = 191,271.83 × 78,173.86
  4. Step 4: Simplify right side
    138,602.04x = 14,952,457,189.68
  5. Step 5: Solve for x
    x = 14,952,457,189.68/138,602.04
  6. Step 6: Final answer
    x = 107,880.50

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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.