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Finding the Fourth Proportional to 90,858.60, 125,430.12 and 70,394.76

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Solution

The fourth proportional to 90,858.60, 125,430.12 and 70,394.76 is: 97,179.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,858.60 : 125,430.12 = 70,394.76 : x
  2. Step 2: Convert to fraction form
    90,858.60/125,430.12 = 70,394.76/x
  3. Step 3: Cross multiply
    90,858.60x = 125,430.12 × 70,394.76
  4. Step 4: Simplify right side
    90,858.60x = 8,829,623,194.17
  5. Step 5: Solve for x
    x = 8,829,623,194.17/90,858.60
  6. Step 6: Final answer
    x = 97,179.83

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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.