Home / 138,384.45-190,988.69-77,966.75

Finding the Fourth Proportional to 138,384.45, 190,988.69 and 77,966.75

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Solution

The fourth proportional to 138,384.45, 190,988.69 and 77,966.75 is: 107,604.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,384.45 : 190,988.69 = 77,966.75 : x
  2. Step 2: Convert to fraction form
    138,384.45/190,988.69 = 77,966.75/x
  3. Step 3: Cross multiply
    138,384.45x = 190,988.69 × 77,966.75
  4. Step 4: Simplify right side
    138,384.45x = 14,890,767,533.70
  5. Step 5: Solve for x
    x = 14,890,767,533.70/138,384.45
  6. Step 6: Final answer
    x = 107,604.34

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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.