Home / 153,987.21-212,500.06-86,005.33

Finding the Fourth Proportional to 153,987.21, 212,500.06 and 86,005.33

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Solution

The fourth proportional to 153,987.21, 212,500.06 and 86,005.33 is: 118,686.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,987.21 : 212,500.06 = 86,005.33 : x
  2. Step 2: Convert to fraction form
    153,987.21/212,500.06 = 86,005.33/x
  3. Step 3: Cross multiply
    153,987.21x = 212,500.06 × 86,005.33
  4. Step 4: Simplify right side
    153,987.21x = 18,276,137,039.06
  5. Step 5: Solve for x
    x = 18,276,137,039.06/153,987.21
  6. Step 6: Final answer
    x = 118,686.07

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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.