Home / 85,106.76-127,623.20-28,931.80

Finding the Fourth Proportional to 85,106.76, 127,623.20 and 28,931.80

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Solution

The fourth proportional to 85,106.76, 127,623.20 and 28,931.80 is: 43,385.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,106.76 : 127,623.20 = 28,931.80 : x
  2. Step 2: Convert to fraction form
    85,106.76/127,623.20 = 28,931.80/x
  3. Step 3: Cross multiply
    85,106.76x = 127,623.20 × 28,931.80
  4. Step 4: Simplify right side
    85,106.76x = 3,692,368,897.76
  5. Step 5: Solve for x
    x = 3,692,368,897.76/85,106.76
  6. Step 6: Final answer
    x = 43,385.14

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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.