Home / 280,503.06-387,127.44-157,999.47

Finding the Fourth Proportional to 280,503.06, 387,127.44 and 157,999.47

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Solution

The fourth proportional to 280,503.06, 387,127.44 and 157,999.47 is: 218,057.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,503.06 : 387,127.44 = 157,999.47 : x
  2. Step 2: Convert to fraction form
    280,503.06/387,127.44 = 157,999.47/x
  3. Step 3: Cross multiply
    280,503.06x = 387,127.44 × 157,999.47
  4. Step 4: Simplify right side
    280,503.06x = 61,165,930,342.46
  5. Step 5: Solve for x
    x = 61,165,930,342.46/280,503.06
  6. Step 6: Final answer
    x = 218,057.98

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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.