Home / 78,733.61-118,148.21-31,985.27

Finding the Fourth Proportional to 78,733.61, 118,148.21 and 31,985.27

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Solution

The fourth proportional to 78,733.61, 118,148.21 and 31,985.27 is: 47,997.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,733.61 : 118,148.21 = 31,985.27 : x
  2. Step 2: Convert to fraction form
    78,733.61/118,148.21 = 31,985.27/x
  3. Step 3: Cross multiply
    78,733.61x = 118,148.21 × 31,985.27
  4. Step 4: Simplify right side
    78,733.61x = 3,779,001,646.20
  5. Step 5: Solve for x
    x = 3,779,001,646.20/78,733.61
  6. Step 6: Final answer
    x = 47,997.32

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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.