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Finding the Fourth Proportional to 128,167.12, 176,870.16 and 74,483.68

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Solution

The fourth proportional to 128,167.12, 176,870.16 and 74,483.68 is: 102,787.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,167.12 : 176,870.16 = 74,483.68 : x
  2. Step 2: Convert to fraction form
    128,167.12/176,870.16 = 74,483.68/x
  3. Step 3: Cross multiply
    128,167.12x = 176,870.16 × 74,483.68
  4. Step 4: Simplify right side
    128,167.12x = 13,173,940,398.99
  5. Step 5: Solve for x
    x = 13,173,940,398.99/128,167.12
  6. Step 6: Final answer
    x = 102,787.21

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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.