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Finding the Fourth Proportional to 139,726.10, 209,728.20 and 64,863.20

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Solution

The fourth proportional to 139,726.10, 209,728.20 and 64,863.20 is: 97,359.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,726.10 : 209,728.20 = 64,863.20 : x
  2. Step 2: Convert to fraction form
    139,726.10/209,728.20 = 64,863.20/x
  3. Step 3: Cross multiply
    139,726.10x = 209,728.20 × 64,863.20
  4. Step 4: Simplify right side
    139,726.10x = 13,603,642,182.24
  5. Step 5: Solve for x
    x = 13,603,642,182.24/139,726.10
  6. Step 6: Final answer
    x = 97,359.35

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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.