Home / 210,783.06-290,866.14-120,136.77

Finding the Fourth Proportional to 210,783.06, 290,866.14 and 120,136.77

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Solution

The fourth proportional to 210,783.06, 290,866.14 and 120,136.77 is: 165,780.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,783.06 : 290,866.14 = 120,136.77 : x
  2. Step 2: Convert to fraction form
    210,783.06/290,866.14 = 120,136.77/x
  3. Step 3: Cross multiply
    210,783.06x = 290,866.14 × 120,136.77
  4. Step 4: Simplify right side
    210,783.06x = 34,943,718,561.97
  5. Step 5: Solve for x
    x = 34,943,718,561.97/210,783.06
  6. Step 6: Final answer
    x = 165,780.49

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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.