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Finding the Fourth Proportional to 85,603.98, 118,132.85 and 47,878.23

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Solution

The fourth proportional to 85,603.98, 118,132.85 and 47,878.23 is: 66,071.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,603.98 : 118,132.85 = 47,878.23 : x
  2. Step 2: Convert to fraction form
    85,603.98/118,132.85 = 47,878.23/x
  3. Step 3: Cross multiply
    85,603.98x = 118,132.85 × 47,878.23
  4. Step 4: Simplify right side
    85,603.98x = 5,655,991,762.86
  5. Step 5: Solve for x
    x = 5,655,991,762.86/85,603.98
  6. Step 6: Final answer
    x = 66,071.60

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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.