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Finding the Fourth Proportional to 130,220, 179,703.60 and 70,604

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Solution

The fourth proportional to 130,220, 179,703.60 and 70,604 is: 97,433.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,220 : 179,703.60 = 70,604 : x
  2. Step 2: Convert to fraction form
    130,220/179,703.60 = 70,604/x
  3. Step 3: Cross multiply
    130,220x = 179,703.60 × 70,604
  4. Step 4: Simplify right side
    130,220x = 12,687,792,974.40
  5. Step 5: Solve for x
    x = 12,687,792,974.40/130,220
  6. Step 6: Final answer
    x = 97,433.52

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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.