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Finding the Fourth Proportional to 84,985.60, 127,492.80 and 25,820.80

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Solution

The fourth proportional to 84,985.60, 127,492.80 and 25,820.80 is: 38,735.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,985.60 : 127,492.80 = 25,820.80 : x
  2. Step 2: Convert to fraction form
    84,985.60/127,492.80 = 25,820.80/x
  3. Step 3: Cross multiply
    84,985.60x = 127,492.80 × 25,820.80
  4. Step 4: Simplify right side
    84,985.60x = 3,291,966,090.24
  5. Step 5: Solve for x
    x = 3,291,966,090.24/84,985.60
  6. Step 6: Final answer
    x = 38,735.58

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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.