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Finding the Fourth Proportional to 91,005.60, 136,508.40 and 61,327.20

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Solution

The fourth proportional to 91,005.60, 136,508.40 and 61,327.20 is: 91,990.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,005.60 : 136,508.40 = 61,327.20 : x
  2. Step 2: Convert to fraction form
    91,005.60/136,508.40 = 61,327.20/x
  3. Step 3: Cross multiply
    91,005.60x = 136,508.40 × 61,327.20
  4. Step 4: Simplify right side
    91,005.60x = 8,371,677,948.48
  5. Step 5: Solve for x
    x = 8,371,677,948.48/91,005.60
  6. Step 6: Final answer
    x = 91,990.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.