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Finding the Fourth Proportional to 130,176, 179,642.88 and 70,560

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Solution

The fourth proportional to 130,176, 179,642.88 and 70,560 is: 97,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,176 : 179,642.88 = 70,560 : x
  2. Step 2: Convert to fraction form
    130,176/179,642.88 = 70,560/x
  3. Step 3: Cross multiply
    130,176x = 179,642.88 × 70,560
  4. Step 4: Simplify right side
    130,176x = 12,675,601,612.80
  5. Step 5: Solve for x
    x = 12,675,601,612.80/130,176
  6. Step 6: Final answer
    x = 97,372.80

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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.