Home / 145,013.78-217,511.93-86,223.58

Finding the Fourth Proportional to 145,013.78, 217,511.93 and 86,223.58

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Solution

The fourth proportional to 145,013.78, 217,511.93 and 86,223.58 is: 129,330.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,013.78 : 217,511.93 = 86,223.58 : x
  2. Step 2: Convert to fraction form
    145,013.78/217,511.93 = 86,223.58/x
  3. Step 3: Cross multiply
    145,013.78x = 217,511.93 × 86,223.58
  4. Step 4: Simplify right side
    145,013.78x = 18,754,657,297.31
  5. Step 5: Solve for x
    x = 18,754,657,297.31/145,013.78
  6. Step 6: Final answer
    x = 129,330.17

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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.