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Finding the Fourth Proportional to 85,920.04, 128,888.76 and 29,760.04

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Solution

The fourth proportional to 85,920.04, 128,888.76 and 29,760.04 is: 44,643.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,920.04 : 128,888.76 = 29,760.04 : x
  2. Step 2: Convert to fraction form
    85,920.04/128,888.76 = 29,760.04/x
  3. Step 3: Cross multiply
    85,920.04x = 128,888.76 × 29,760.04
  4. Step 4: Simplify right side
    85,920.04x = 3,835,734,008.71
  5. Step 5: Solve for x
    x = 3,835,734,008.71/85,920.04
  6. Step 6: Final answer
    x = 44,643.07

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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.