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Finding the Fourth Proportional to 84,915.40, 127,373.10 and 83,603.20

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Solution

The fourth proportional to 84,915.40, 127,373.10 and 83,603.20 is: 125,404.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,915.40 : 127,373.10 = 83,603.20 : x
  2. Step 2: Convert to fraction form
    84,915.40/127,373.10 = 83,603.20/x
  3. Step 3: Cross multiply
    84,915.40x = 127,373.10 × 83,603.20
  4. Step 4: Simplify right side
    84,915.40x = 10,648,798,753.92
  5. Step 5: Solve for x
    x = 10,648,798,753.92/84,915.40
  6. Step 6: Final answer
    x = 125,404.80

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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.