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Finding the Fourth Proportional to 103,145.40, 154,718.10 and 76,901.40

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Solution

The fourth proportional to 103,145.40, 154,718.10 and 76,901.40 is: 115,352.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,145.40 : 154,718.10 = 76,901.40 : x
  2. Step 2: Convert to fraction form
    103,145.40/154,718.10 = 76,901.40/x
  3. Step 3: Cross multiply
    103,145.40x = 154,718.10 × 76,901.40
  4. Step 4: Simplify right side
    103,145.40x = 11,898,038,495.34
  5. Step 5: Solve for x
    x = 11,898,038,495.34/103,145.40
  6. Step 6: Final answer
    x = 115,352.10

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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.