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Finding the Fourth Proportional to 56,980.92, 78,670.80 and 51,002.40

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Solution

The fourth proportional to 56,980.92, 78,670.80 and 51,002.40 is: 70,416.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,980.92 : 78,670.80 = 51,002.40 : x
  2. Step 2: Convert to fraction form
    56,980.92/78,670.80 = 51,002.40/x
  3. Step 3: Cross multiply
    56,980.92x = 78,670.80 × 51,002.40
  4. Step 4: Simplify right side
    56,980.92x = 4,012,399,609.92
  5. Step 5: Solve for x
    x = 4,012,399,609.92/56,980.92
  6. Step 6: Final answer
    x = 70,416.55

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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.