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Finding the Fourth Proportional to 131,503.64, 181,430.70 and 74,874.92

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Solution

The fourth proportional to 131,503.64, 181,430.70 and 74,874.92 is: 103,302.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,503.64 : 181,430.70 = 74,874.92 : x
  2. Step 2: Convert to fraction form
    131,503.64/181,430.70 = 74,874.92/x
  3. Step 3: Cross multiply
    131,503.64x = 181,430.70 × 74,874.92
  4. Step 4: Simplify right side
    131,503.64x = 13,584,609,148.04
  5. Step 5: Solve for x
    x = 13,584,609,148.04/131,503.64
  6. Step 6: Final answer
    x = 103,302.15

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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.