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Finding the Fourth Proportional to 89,878.40, 134,866.20 and 39,966.20

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Solution

The fourth proportional to 89,878.40, 134,866.20 and 39,966.20 is: 59,970.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,878.40 : 134,866.20 = 39,966.20 : x
  2. Step 2: Convert to fraction form
    89,878.40/134,866.20 = 39,966.20/x
  3. Step 3: Cross multiply
    89,878.40x = 134,866.20 × 39,966.20
  4. Step 4: Simplify right side
    89,878.40x = 5,390,089,522.44
  5. Step 5: Solve for x
    x = 5,390,089,522.44/89,878.40
  6. Step 6: Final answer
    x = 59,970.91

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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.