Home / 85,905.90-128,827.95-29,730.75

Finding the Fourth Proportional to 85,905.90, 128,827.95 and 29,730.75

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Solution

The fourth proportional to 85,905.90, 128,827.95 and 29,730.75 is: 44,585.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,905.90 : 128,827.95 = 29,730.75 : x
  2. Step 2: Convert to fraction form
    85,905.90/128,827.95 = 29,730.75/x
  3. Step 3: Cross multiply
    85,905.90x = 128,827.95 × 29,730.75
  4. Step 4: Simplify right side
    85,905.90x = 3,830,151,574.46
  5. Step 5: Solve for x
    x = 3,830,151,574.46/85,905.90
  6. Step 6: Final answer
    x = 44,585.43

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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.