Home / 112,689.87-155,507.20-61,701.67

Finding the Fourth Proportional to 112,689.87, 155,507.20 and 61,701.67

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Solution

The fourth proportional to 112,689.87, 155,507.20 and 61,701.67 is: 85,145.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,689.87 : 155,507.20 = 61,701.67 : x
  2. Step 2: Convert to fraction form
    112,689.87/155,507.20 = 61,701.67/x
  3. Step 3: Cross multiply
    112,689.87x = 155,507.20 × 61,701.67
  4. Step 4: Simplify right side
    112,689.87x = 9,595,053,937.02
  5. Step 5: Solve for x
    x = 9,595,053,937.02/112,689.87
  6. Step 6: Final answer
    x = 85,145.67

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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.