Home / 112,742.35-155,403.76-76,432.69

Finding the Fourth Proportional to 112,742.35, 155,403.76 and 76,432.69

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Solution

The fourth proportional to 112,742.35, 155,403.76 and 76,432.69 is: 105,354.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,742.35 : 155,403.76 = 76,432.69 : x
  2. Step 2: Convert to fraction form
    112,742.35/155,403.76 = 76,432.69/x
  3. Step 3: Cross multiply
    112,742.35x = 155,403.76 × 76,432.69
  4. Step 4: Simplify right side
    112,742.35x = 11,877,927,412.91
  5. Step 5: Solve for x
    x = 11,877,927,412.91/112,742.35
  6. Step 6: Final answer
    x = 105,354.62

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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.