Home / 90,871.38-136,307.16-31,692.78

Finding the Fourth Proportional to 90,871.38, 136,307.16 and 31,692.78

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Solution

The fourth proportional to 90,871.38, 136,307.16 and 31,692.78 is: 47,539.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,871.38 : 136,307.16 = 31,692.78 : x
  2. Step 2: Convert to fraction form
    90,871.38/136,307.16 = 31,692.78/x
  3. Step 3: Cross multiply
    90,871.38x = 136,307.16 × 31,692.78
  4. Step 4: Simplify right side
    90,871.38x = 4,319,952,834.30
  5. Step 5: Solve for x
    x = 4,319,952,834.30/90,871.38
  6. Step 6: Final answer
    x = 47,539.20

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1.5x scale

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.