Home / 56,931.20-85,281.60-39,420.80

Finding the Fourth Proportional to 56,931.20, 85,281.60 and 39,420.80

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Solution

The fourth proportional to 56,931.20, 85,281.60 and 39,420.80 is: 59,051.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,931.20 : 85,281.60 = 39,420.80 : x
  2. Step 2: Convert to fraction form
    56,931.20/85,281.60 = 39,420.80/x
  3. Step 3: Cross multiply
    56,931.20x = 85,281.60 × 39,420.80
  4. Step 4: Simplify right side
    56,931.20x = 3,361,868,897.28
  5. Step 5: Solve for x
    x = 3,361,868,897.28/56,931.20
  6. Step 6: Final answer
    x = 59,051.43

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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.