Home / 100,036.90-138,069.39-64,271.62

Finding the Fourth Proportional to 100,036.90, 138,069.39 and 64,271.62

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Solution

The fourth proportional to 100,036.90, 138,069.39 and 64,271.62 is: 88,706.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,036.90 : 138,069.39 = 64,271.62 : x
  2. Step 2: Convert to fraction form
    100,036.90/138,069.39 = 64,271.62/x
  3. Step 3: Cross multiply
    100,036.90x = 138,069.39 × 64,271.62
  4. Step 4: Simplify right side
    100,036.90x = 8,873,943,367.71
  5. Step 5: Solve for x
    x = 8,873,943,367.71/100,036.90
  6. Step 6: Final answer
    x = 88,706.70

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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.