Home / 280,726.02-421,155.14-91,185.80

Finding the Fourth Proportional to 280,726.02, 421,155.14 and 91,185.80

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Solution

The fourth proportional to 280,726.02, 421,155.14 and 91,185.80 is: 136,800.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,726.02 : 421,155.14 = 91,185.80 : x
  2. Step 2: Convert to fraction form
    280,726.02/421,155.14 = 91,185.80/x
  3. Step 3: Cross multiply
    280,726.02x = 421,155.14 × 91,185.80
  4. Step 4: Simplify right side
    280,726.02x = 38,403,365,803.31
  5. Step 5: Solve for x
    x = 38,403,365,803.31/280,726.02
  6. Step 6: Final answer
    x = 136,800.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.