Home / 138,767.04-191,507.76-78,316.20

Finding the Fourth Proportional to 138,767.04, 191,507.76 and 78,316.20

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Solution

The fourth proportional to 138,767.04, 191,507.76 and 78,316.20 is: 108,081.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,767.04 : 191,507.76 = 78,316.20 : x
  2. Step 2: Convert to fraction form
    138,767.04/191,507.76 = 78,316.20/x
  3. Step 3: Cross multiply
    138,767.04x = 191,507.76 × 78,316.20
  4. Step 4: Simplify right side
    138,767.04x = 14,998,160,033.71
  5. Step 5: Solve for x
    x = 14,998,160,033.71/138,767.04
  6. Step 6: Final answer
    x = 108,081.57

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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.