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Finding the Fourth Proportional to 91,285.60, 137,030.80 and 70,600.80

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Solution

The fourth proportional to 91,285.60, 137,030.80 and 70,600.80 is: 105,980.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,285.60 : 137,030.80 = 70,600.80 : x
  2. Step 2: Convert to fraction form
    91,285.60/137,030.80 = 70,600.80/x
  3. Step 3: Cross multiply
    91,285.60x = 137,030.80 × 70,600.80
  4. Step 4: Simplify right side
    91,285.60x = 9,674,484,104.64
  5. Step 5: Solve for x
    x = 9,674,484,104.64/91,285.60
  6. Step 6: Final answer
    x = 105,980.40

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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.