Home / 90,784.64-136,176.96-28,460

Finding the Fourth Proportional to 90,784.64, 136,176.96 and 28,460

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Solution

The fourth proportional to 90,784.64, 136,176.96 and 28,460 is: 42,690

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,784.64 : 136,176.96 = 28,460 : x
  2. Step 2: Convert to fraction form
    90,784.64/136,176.96 = 28,460/x
  3. Step 3: Cross multiply
    90,784.64x = 136,176.96 × 28,460
  4. Step 4: Simplify right side
    90,784.64x = 3,875,596,281.60
  5. Step 5: Solve for x
    x = 3,875,596,281.60/90,784.64
  6. Step 6: Final answer
    x = 42,690

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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.