Home / 112,699.32-155,211.44-87,111.42

Finding the Fourth Proportional to 112,699.32, 155,211.44 and 87,111.42

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Solution

The fourth proportional to 112,699.32, 155,211.44 and 87,111.42 is: 119,971.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,699.32 : 155,211.44 = 87,111.42 : x
  2. Step 2: Convert to fraction form
    112,699.32/155,211.44 = 87,111.42/x
  3. Step 3: Cross multiply
    112,699.32x = 155,211.44 × 87,111.42
  4. Step 4: Simplify right side
    112,699.32x = 13,520,688,411.05
  5. Step 5: Solve for x
    x = 13,520,688,411.05/112,699.32
  6. Step 6: Final answer
    x = 119,971.34

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1.5x scale

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.