Home / 100,152.45-138,210.39-54,830.70

Finding the Fourth Proportional to 100,152.45, 138,210.39 and 54,830.70

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Solution

The fourth proportional to 100,152.45, 138,210.39 and 54,830.70 is: 75,666.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,152.45 : 138,210.39 = 54,830.70 : x
  2. Step 2: Convert to fraction form
    100,152.45/138,210.39 = 54,830.70/x
  3. Step 3: Cross multiply
    100,152.45x = 138,210.39 × 54,830.70
  4. Step 4: Simplify right side
    100,152.45x = 7,578,172,430.97
  5. Step 5: Solve for x
    x = 7,578,172,430.97/100,152.45
  6. Step 6: Final answer
    x = 75,666.37

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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.