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Finding the Fourth Proportional to 74,117.76, 102,442.50 and 65,559.30

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Solution

The fourth proportional to 74,117.76, 102,442.50 and 65,559.30 is: 90,613.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,117.76 : 102,442.50 = 65,559.30 : x
  2. Step 2: Convert to fraction form
    74,117.76/102,442.50 = 65,559.30/x
  3. Step 3: Cross multiply
    74,117.76x = 102,442.50 × 65,559.30
  4. Step 4: Simplify right side
    74,117.76x = 6,716,058,590.25
  5. Step 5: Solve for x
    x = 6,716,058,590.25/74,117.76
  6. Step 6: Final answer
    x = 90,613.35

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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.