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Finding the Fourth Proportional to 105,358.66, 145,395 and 57,612.40

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Solution

The fourth proportional to 105,358.66, 145,395 and 57,612.40 is: 79,505.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,358.66 : 145,395 = 57,612.40 : x
  2. Step 2: Convert to fraction form
    105,358.66/145,395 = 57,612.40/x
  3. Step 3: Cross multiply
    105,358.66x = 145,395 × 57,612.40
  4. Step 4: Simplify right side
    105,358.66x = 8,376,554,898
  5. Step 5: Solve for x
    x = 8,376,554,898/105,358.66
  6. Step 6: Final answer
    x = 79,505.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.