Home / 137,709.04-189,995.16-77,270.80

Finding the Fourth Proportional to 137,709.04, 189,995.16 and 77,270.80

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Solution

The fourth proportional to 137,709.04, 189,995.16 and 77,270.80 is: 106,609.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,709.04 : 189,995.16 = 77,270.80 : x
  2. Step 2: Convert to fraction form
    137,709.04/189,995.16 = 77,270.80/x
  3. Step 3: Cross multiply
    137,709.04x = 189,995.16 × 77,270.80
  4. Step 4: Simplify right side
    137,709.04x = 14,681,078,009.33
  5. Step 5: Solve for x
    x = 14,681,078,009.33/137,709.04
  6. Step 6: Final answer
    x = 106,609.40

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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.