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Finding the Fourth Proportional to 112,563.53, 155,289.52 and 64,806.74

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Solution

The fourth proportional to 112,563.53, 155,289.52 and 64,806.74 is: 89,405.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,563.53 : 155,289.52 = 64,806.74 : x
  2. Step 2: Convert to fraction form
    112,563.53/155,289.52 = 64,806.74/x
  3. Step 3: Cross multiply
    112,563.53x = 155,289.52 × 64,806.74
  4. Step 4: Simplify right side
    112,563.53x = 10,063,807,547.36
  5. Step 5: Solve for x
    x = 10,063,807,547.36/112,563.53
  6. Step 6: Final answer
    x = 89,405.58

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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.