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Finding the Fourth Proportional to 67,420.80, 100,985.40 and 43,801.20

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Solution

The fourth proportional to 67,420.80, 100,985.40 and 43,801.20 is: 65,607.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,420.80 : 100,985.40 = 43,801.20 : x
  2. Step 2: Convert to fraction form
    67,420.80/100,985.40 = 43,801.20/x
  3. Step 3: Cross multiply
    67,420.80x = 100,985.40 × 43,801.20
  4. Step 4: Simplify right side
    67,420.80x = 4,423,281,702.48
  5. Step 5: Solve for x
    x = 4,423,281,702.48/67,420.80
  6. Step 6: Final answer
    x = 65,607.08

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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.