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Finding the Fourth Proportional to 91,443.60, 137,165.40 and 70,707.60

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Solution

The fourth proportional to 91,443.60, 137,165.40 and 70,707.60 is: 106,061.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,443.60 : 137,165.40 = 70,707.60 : x
  2. Step 2: Convert to fraction form
    91,443.60/137,165.40 = 70,707.60/x
  3. Step 3: Cross multiply
    91,443.60x = 137,165.40 × 70,707.60
  4. Step 4: Simplify right side
    91,443.60x = 9,698,636,237.04
  5. Step 5: Solve for x
    x = 9,698,636,237.04/91,443.60
  6. Step 6: Final answer
    x = 106,061.40

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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.