Home / 153,857.08-212,155.39-100,042.30

Finding the Fourth Proportional to 153,857.08, 212,155.39 and 100,042.30

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Solution

The fourth proportional to 153,857.08, 212,155.39 and 100,042.30 is: 137,949.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,857.08 : 212,155.39 = 100,042.30 : x
  2. Step 2: Convert to fraction form
    153,857.08/212,155.39 = 100,042.30/x
  3. Step 3: Cross multiply
    153,857.08x = 212,155.39 × 100,042.30
  4. Step 4: Simplify right side
    153,857.08x = 21,224,513,000.51
  5. Step 5: Solve for x
    x = 21,224,513,000.51/153,857.08
  6. Step 6: Final answer
    x = 137,949.54

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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.