Home / 112,970.12-155,900.34-61,981.91

Finding the Fourth Proportional to 112,970.12, 155,900.34 and 61,981.91

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Solution

The fourth proportional to 112,970.12, 155,900.34 and 61,981.91 is: 85,535.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,970.12 : 155,900.34 = 61,981.91 : x
  2. Step 2: Convert to fraction form
    112,970.12/155,900.34 = 61,981.91/x
  3. Step 3: Cross multiply
    112,970.12x = 155,900.34 × 61,981.91
  4. Step 4: Simplify right side
    112,970.12x = 9,663,000,063.35
  5. Step 5: Solve for x
    x = 9,663,000,063.35/112,970.12
  6. Step 6: Final answer
    x = 85,535.90

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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.