Home / 112,821.15-155,695.20-61,830.50

Finding the Fourth Proportional to 112,821.15, 155,695.20 and 61,830.50

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Solution

The fourth proportional to 112,821.15, 155,695.20 and 61,830.50 is: 85,327.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,821.15 : 155,695.20 = 61,830.50 : x
  2. Step 2: Convert to fraction form
    112,821.15/155,695.20 = 61,830.50/x
  3. Step 3: Cross multiply
    112,821.15x = 155,695.20 × 61,830.50
  4. Step 4: Simplify right side
    112,821.15x = 9,626,711,285.12
  5. Step 5: Solve for x
    x = 9,626,711,285.12/112,821.15
  6. Step 6: Final answer
    x = 85,327.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.