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Finding the Fourth Proportional to 88,206.40, 131,985.60 and 64,878.40

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Solution

The fourth proportional to 88,206.40, 131,985.60 and 64,878.40 is: 97,079.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,206.40 : 131,985.60 = 64,878.40 : x
  2. Step 2: Convert to fraction form
    88,206.40/131,985.60 = 64,878.40/x
  3. Step 3: Cross multiply
    88,206.40x = 131,985.60 × 64,878.40
  4. Step 4: Simplify right side
    88,206.40x = 8,563,014,551.04
  5. Step 5: Solve for x
    x = 8,563,014,551.04/88,206.40
  6. Step 6: Final answer
    x = 97,079.29

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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.