Home / 78,990.65-118,381.18-34,569.03

Finding the Fourth Proportional to 78,990.65, 118,381.18 and 34,569.03

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Solution

The fourth proportional to 78,990.65, 118,381.18 and 34,569.03 is: 51,807.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,990.65 : 118,381.18 = 34,569.03 : x
  2. Step 2: Convert to fraction form
    78,990.65/118,381.18 = 34,569.03/x
  3. Step 3: Cross multiply
    78,990.65x = 118,381.18 × 34,569.03
  4. Step 4: Simplify right side
    78,990.65x = 4,092,322,985.18
  5. Step 5: Solve for x
    x = 4,092,322,985.18/78,990.65
  6. Step 6: Final answer
    x = 51,807.69

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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.