Home / 52,085.61-78,128.45-12,642.76

Finding the Fourth Proportional to 52,085.61, 78,128.45 and 12,642.76

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Solution

The fourth proportional to 52,085.61, 78,128.45 and 12,642.76 is: 18,964.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,085.61 : 78,128.45 = 12,642.76 : x
  2. Step 2: Convert to fraction form
    52,085.61/78,128.45 = 12,642.76/x
  3. Step 3: Cross multiply
    52,085.61x = 78,128.45 × 12,642.76
  4. Step 4: Simplify right side
    52,085.61x = 987,759,274.13
  5. Step 5: Solve for x
    x = 987,759,274.13/52,085.61
  6. Step 6: Final answer
    x = 18,964.15

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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.