Home / 145,411.34-200,686.32-81,761.42

Finding the Fourth Proportional to 145,411.34, 200,686.32 and 81,761.42

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Solution

The fourth proportional to 145,411.34, 200,686.32 and 81,761.42 is: 112,841.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,411.34 : 200,686.32 = 81,761.42 : x
  2. Step 2: Convert to fraction form
    145,411.34/200,686.32 = 81,761.42/x
  3. Step 3: Cross multiply
    145,411.34x = 200,686.32 × 81,761.42
  4. Step 4: Simplify right side
    145,411.34x = 16,408,398,999.49
  5. Step 5: Solve for x
    x = 16,408,398,999.49/145,411.34
  6. Step 6: Final answer
    x = 112,841.27

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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.