Home / 85,815.24-128,740.20-29,657.40

Finding the Fourth Proportional to 85,815.24, 128,740.20 and 29,657.40

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Solution

The fourth proportional to 85,815.24, 128,740.20 and 29,657.40 is: 44,492.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,815.24 : 128,740.20 = 29,657.40 : x
  2. Step 2: Convert to fraction form
    85,815.24/128,740.20 = 29,657.40/x
  3. Step 3: Cross multiply
    85,815.24x = 128,740.20 × 29,657.40
  4. Step 4: Simplify right side
    85,815.24x = 3,818,099,607.48
  5. Step 5: Solve for x
    x = 3,818,099,607.48/85,815.24
  6. Step 6: Final answer
    x = 44,492.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.