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Finding the Fourth Proportional to 66,421.40, 99,688.80 and 27,006.80

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Solution

The fourth proportional to 66,421.40, 99,688.80 and 27,006.80 is: 40,533.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,421.40 : 99,688.80 = 27,006.80 : x
  2. Step 2: Convert to fraction form
    66,421.40/99,688.80 = 27,006.80/x
  3. Step 3: Cross multiply
    66,421.40x = 99,688.80 × 27,006.80
  4. Step 4: Simplify right side
    66,421.40x = 2,692,275,483.84
  5. Step 5: Solve for x
    x = 2,692,275,483.84/66,421.40
  6. Step 6: Final answer
    x = 40,533.25

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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.