Home / 85,348.48-128,088.06-38,634.16

Finding the Fourth Proportional to 85,348.48, 128,088.06 and 38,634.16

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Solution

The fourth proportional to 85,348.48, 128,088.06 and 38,634.16 is: 57,980.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,348.48 : 128,088.06 = 38,634.16 : x
  2. Step 2: Convert to fraction form
    85,348.48/128,088.06 = 38,634.16/x
  3. Step 3: Cross multiply
    85,348.48x = 128,088.06 × 38,634.16
  4. Step 4: Simplify right side
    85,348.48x = 4,948,574,604.13
  5. Step 5: Solve for x
    x = 4,948,574,604.13/85,348.48
  6. Step 6: Final answer
    x = 57,980.82

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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.