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Finding the Fourth Proportional to 88,117.40, 131,957.40 and 70,621.40

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Solution

The fourth proportional to 88,117.40, 131,957.40 and 70,621.40 is: 105,756.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,117.40 : 131,957.40 = 70,621.40 : x
  2. Step 2: Convert to fraction form
    88,117.40/131,957.40 = 70,621.40/x
  3. Step 3: Cross multiply
    88,117.40x = 131,957.40 × 70,621.40
  4. Step 4: Simplify right side
    88,117.40x = 9,319,016,328.36
  5. Step 5: Solve for x
    x = 9,319,016,328.36/88,117.40
  6. Step 6: Final answer
    x = 105,756.82

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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.