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Finding the Fourth Proportional to 130,240, 179,731.32 and 70,624

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Solution

The fourth proportional to 130,240, 179,731.32 and 70,624 is: 97,461.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,240 : 179,731.32 = 70,624 : x
  2. Step 2: Convert to fraction form
    130,240/179,731.32 = 70,624/x
  3. Step 3: Cross multiply
    130,240x = 179,731.32 × 70,624
  4. Step 4: Simplify right side
    130,240x = 12,693,344,743.68
  5. Step 5: Solve for x
    x = 12,693,344,743.68/130,240
  6. Step 6: Final answer
    x = 97,461.19

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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.