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Finding the Fourth Proportional to 85,113.80, 117,347.26 and 69,743.20

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Solution

The fourth proportional to 85,113.80, 117,347.26 and 69,743.20 is: 96,155.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,113.80 : 117,347.26 = 69,743.20 : x
  2. Step 2: Convert to fraction form
    85,113.80/117,347.26 = 69,743.20/x
  3. Step 3: Cross multiply
    85,113.80x = 117,347.26 × 69,743.20
  4. Step 4: Simplify right side
    85,113.80x = 8,184,173,423.63
  5. Step 5: Solve for x
    x = 8,184,173,423.63/85,113.80
  6. Step 6: Final answer
    x = 96,155.66

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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.