Home / 85,657.10-128,511.93-38,312.02

Finding the Fourth Proportional to 85,657.10, 128,511.93 and 38,312.02

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Solution

The fourth proportional to 85,657.10, 128,511.93 and 38,312.02 is: 57,479.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,657.10 : 128,511.93 = 38,312.02 : x
  2. Step 2: Convert to fraction form
    85,657.10/128,511.93 = 38,312.02/x
  3. Step 3: Cross multiply
    85,657.10x = 128,511.93 × 38,312.02
  4. Step 4: Simplify right side
    85,657.10x = 4,923,551,936.71
  5. Step 5: Solve for x
    x = 4,923,551,936.71/85,657.10
  6. Step 6: Final answer
    x = 57,479.79

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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.