Home / 153,869.63-212,364.69-90,207.42

Finding the Fourth Proportional to 153,869.63, 212,364.69 and 90,207.42

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Solution

The fourth proportional to 153,869.63, 212,364.69 and 90,207.42 is: 124,500.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,869.63 : 212,364.69 = 90,207.42 : x
  2. Step 2: Convert to fraction form
    153,869.63/212,364.69 = 90,207.42/x
  3. Step 3: Cross multiply
    153,869.63x = 212,364.69 × 90,207.42
  4. Step 4: Simplify right side
    153,869.63x = 19,156,870,784.00
  5. Step 5: Solve for x
    x = 19,156,870,784.00/153,869.63
  6. Step 6: Final answer
    x = 124,500.67

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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.