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Finding the Fourth Proportional to 130,221.50, 179,706.75 and 70,605.50

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Solution

The fourth proportional to 130,221.50, 179,706.75 and 70,605.50 is: 97,436.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,221.50 : 179,706.75 = 70,605.50 : x
  2. Step 2: Convert to fraction form
    130,221.50/179,706.75 = 70,605.50/x
  3. Step 3: Cross multiply
    130,221.50x = 179,706.75 × 70,605.50
  4. Step 4: Simplify right side
    130,221.50x = 12,688,284,937.13
  5. Step 5: Solve for x
    x = 12,688,284,937.13/130,221.50
  6. Step 6: Final answer
    x = 97,436.18

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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.