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Finding the Fourth Proportional to 130,515, 180,110.88 and 70,899

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Solution

The fourth proportional to 130,515, 180,110.88 and 70,899 is: 97,840.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,515 : 180,110.88 = 70,899 : x
  2. Step 2: Convert to fraction form
    130,515/180,110.88 = 70,899/x
  3. Step 3: Cross multiply
    130,515x = 180,110.88 × 70,899
  4. Step 4: Simplify right side
    130,515x = 12,769,681,281.12
  5. Step 5: Solve for x
    x = 12,769,681,281.12/130,515
  6. Step 6: Final answer
    x = 97,840.72

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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.