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Finding the Fourth Proportional to 81,580.59, 112,522.86 and 70,809.57

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Solution

The fourth proportional to 81,580.59, 112,522.86 and 70,809.57 is: 97,666.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,580.59 : 112,522.86 = 70,809.57 : x
  2. Step 2: Convert to fraction form
    81,580.59/112,522.86 = 70,809.57/x
  3. Step 3: Cross multiply
    81,580.59x = 112,522.86 × 70,809.57
  4. Step 4: Simplify right side
    81,580.59x = 7,967,695,331.77
  5. Step 5: Solve for x
    x = 7,967,695,331.77/81,580.59
  6. Step 6: Final answer
    x = 97,666.56

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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.