Home / 280,837.40-421,256.10-81,164.30

Finding the Fourth Proportional to 280,837.40, 421,256.10 and 81,164.30

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Solution

The fourth proportional to 280,837.40, 421,256.10 and 81,164.30 is: 121,746.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,837.40 : 421,256.10 = 81,164.30 : x
  2. Step 2: Convert to fraction form
    280,837.40/421,256.10 = 81,164.30/x
  3. Step 3: Cross multiply
    280,837.40x = 421,256.10 × 81,164.30
  4. Step 4: Simplify right side
    280,837.40x = 34,190,956,477.23
  5. Step 5: Solve for x
    x = 34,190,956,477.23/280,837.40
  6. Step 6: Final answer
    x = 121,746.45

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1.5x scale

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.