Home / 280,302.21-420,520.28-90,762.77

Finding the Fourth Proportional to 280,302.21, 420,520.28 and 90,762.77

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Solution

The fourth proportional to 280,302.21, 420,520.28 and 90,762.77 is: 136,165.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,302.21 : 420,520.28 = 90,762.77 : x
  2. Step 2: Convert to fraction form
    280,302.21/420,520.28 = 90,762.77/x
  3. Step 3: Cross multiply
    280,302.21x = 420,520.28 × 90,762.77
  4. Step 4: Simplify right side
    280,302.21x = 38,167,586,051.46
  5. Step 5: Solve for x
    x = 38,167,586,051.46/280,302.21
  6. Step 6: Final answer
    x = 136,165.84

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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.