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Finding the Fourth Proportional to 153,894.60, 212,289.21 and 90,220.14

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Solution

The fourth proportional to 153,894.60, 212,289.21 and 90,220.14 is: 124,453.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,894.60 : 212,289.21 = 90,220.14 : x
  2. Step 2: Convert to fraction form
    153,894.60/212,289.21 = 90,220.14/x
  3. Step 3: Cross multiply
    153,894.60x = 212,289.21 × 90,220.14
  4. Step 4: Simplify right side
    153,894.60x = 19,152,762,246.69
  5. Step 5: Solve for x
    x = 19,152,762,246.69/153,894.60
  6. Step 6: Final answer
    x = 124,453.76

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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.