Home / 109,389.60-163,985.40-76,125.60

Finding the Fourth Proportional to 109,389.60, 163,985.40 and 76,125.60

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Solution

The fourth proportional to 109,389.60, 163,985.40 and 76,125.60 is: 114,119.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,389.60 : 163,985.40 = 76,125.60 : x
  2. Step 2: Convert to fraction form
    109,389.60/163,985.40 = 76,125.60/x
  3. Step 3: Cross multiply
    109,389.60x = 163,985.40 × 76,125.60
  4. Step 4: Simplify right side
    109,389.60x = 12,483,486,966.24
  5. Step 5: Solve for x
    x = 12,483,486,966.24/109,389.60
  6. Step 6: Final answer
    x = 114,119.50

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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.