Home / 78,737.61-118,154.21-31,989.27

Finding the Fourth Proportional to 78,737.61, 118,154.21 and 31,989.27

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Solution

The fourth proportional to 78,737.61, 118,154.21 and 31,989.27 is: 48,003.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,737.61 : 118,154.21 = 31,989.27 : x
  2. Step 2: Convert to fraction form
    78,737.61/118,154.21 = 31,989.27/x
  3. Step 3: Cross multiply
    78,737.61x = 118,154.21 × 31,989.27
  4. Step 4: Simplify right side
    78,737.61x = 3,779,666,925.33
  5. Step 5: Solve for x
    x = 3,779,666,925.33/78,737.61
  6. Step 6: Final answer
    x = 48,003.32

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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.