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Finding the Fourth Proportional to 67,985.60, 101,978.40 and 57,925.40

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Solution

The fourth proportional to 67,985.60, 101,978.40 and 57,925.40 is: 86,888.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,985.60 : 101,978.40 = 57,925.40 : x
  2. Step 2: Convert to fraction form
    67,985.60/101,978.40 = 57,925.40/x
  3. Step 3: Cross multiply
    67,985.60x = 101,978.40 × 57,925.40
  4. Step 4: Simplify right side
    67,985.60x = 5,907,139,611.36
  5. Step 5: Solve for x
    x = 5,907,139,611.36/67,985.60
  6. Step 6: Final answer
    x = 86,888.10

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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.