Home / 145,079.36-200,159.52-81,408.32

Finding the Fourth Proportional to 145,079.36, 200,159.52 and 81,408.32

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Solution

The fourth proportional to 145,079.36, 200,159.52 and 81,408.32 is: 112,315.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,079.36 : 200,159.52 = 81,408.32 : x
  2. Step 2: Convert to fraction form
    145,079.36/200,159.52 = 81,408.32/x
  3. Step 3: Cross multiply
    145,079.36x = 200,159.52 × 81,408.32
  4. Step 4: Simplify right side
    145,079.36x = 16,294,650,255.21
  5. Step 5: Solve for x
    x = 16,294,650,255.21/145,079.36
  6. Step 6: Final answer
    x = 112,315.43

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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.