Home / 148,281.57-204,678.45-90,138.09

Finding the Fourth Proportional to 148,281.57, 204,678.45 and 90,138.09

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Solution

The fourth proportional to 148,281.57, 204,678.45 and 90,138.09 is: 124,420.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,281.57 : 204,678.45 = 90,138.09 : x
  2. Step 2: Convert to fraction form
    148,281.57/204,678.45 = 90,138.09/x
  3. Step 3: Cross multiply
    148,281.57x = 204,678.45 × 90,138.09
  4. Step 4: Simplify right side
    148,281.57x = 18,449,324,547.16
  5. Step 5: Solve for x
    x = 18,449,324,547.16/148,281.57
  6. Step 6: Final answer
    x = 124,420.89

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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.