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Finding the Fourth Proportional to 130,892.80, 180,630.72 and 71,276.80

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Solution

The fourth proportional to 130,892.80, 180,630.72 and 71,276.80 is: 98,361.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,892.80 : 180,630.72 = 71,276.80 : x
  2. Step 2: Convert to fraction form
    130,892.80/180,630.72 = 71,276.80/x
  3. Step 3: Cross multiply
    130,892.80x = 180,630.72 × 71,276.80
  4. Step 4: Simplify right side
    130,892.80x = 12,874,779,703.30
  5. Step 5: Solve for x
    x = 12,874,779,703.30/130,892.80
  6. Step 6: Final answer
    x = 98,361.25

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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.