Home / 158,721.62-219,038.49-87,108.30

Finding the Fourth Proportional to 158,721.62, 219,038.49 and 87,108.30

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Solution

The fourth proportional to 158,721.62, 219,038.49 and 87,108.30 is: 120,210.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,721.62 : 219,038.49 = 87,108.30 : x
  2. Step 2: Convert to fraction form
    158,721.62/219,038.49 = 87,108.30/x
  3. Step 3: Cross multiply
    158,721.62x = 219,038.49 × 87,108.30
  4. Step 4: Simplify right side
    158,721.62x = 19,080,070,498.47
  5. Step 5: Solve for x
    x = 19,080,070,498.47/158,721.62
  6. Step 6: Final answer
    x = 120,210.91

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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.