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Finding the Fourth Proportional to 56,985.60, 85,478.40 and 15,432.60

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Solution

The fourth proportional to 56,985.60, 85,478.40 and 15,432.60 is: 23,148.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,985.60 : 85,478.40 = 15,432.60 : x
  2. Step 2: Convert to fraction form
    56,985.60/85,478.40 = 15,432.60/x
  3. Step 3: Cross multiply
    56,985.60x = 85,478.40 × 15,432.60
  4. Step 4: Simplify right side
    56,985.60x = 1,319,153,955.84
  5. Step 5: Solve for x
    x = 1,319,153,955.84/56,985.60
  6. Step 6: Final answer
    x = 23,148.90

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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.