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Finding the Fourth Proportional to 98,600.80, 136,038 and 56,156.80

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Solution

The fourth proportional to 98,600.80, 136,038 and 56,156.80 is: 77,478.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,600.80 : 136,038 = 56,156.80 : x
  2. Step 2: Convert to fraction form
    98,600.80/136,038 = 56,156.80/x
  3. Step 3: Cross multiply
    98,600.80x = 136,038 × 56,156.80
  4. Step 4: Simplify right side
    98,600.80x = 7,639,458,758.40
  5. Step 5: Solve for x
    x = 7,639,458,758.40/98,600.80
  6. Step 6: Final answer
    x = 77,478.67

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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.