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Finding the Fourth Proportional to 90,624.30, 125,075.16 and 65,214.78

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Solution

The fourth proportional to 90,624.30, 125,075.16 and 65,214.78 is: 90,006.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,624.30 : 125,075.16 = 65,214.78 : x
  2. Step 2: Convert to fraction form
    90,624.30/125,075.16 = 65,214.78/x
  3. Step 3: Cross multiply
    90,624.30x = 125,075.16 × 65,214.78
  4. Step 4: Simplify right side
    90,624.30x = 8,156,749,042.86
  5. Step 5: Solve for x
    x = 8,156,749,042.86/90,624.30
  6. Step 6: Final answer
    x = 90,006.20

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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.