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Finding the Fourth Proportional to 138,312.48, 207,483.12 and 52,923.18

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Solution

The fourth proportional to 138,312.48, 207,483.12 and 52,923.18 is: 79,390.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,312.48 : 207,483.12 = 52,923.18 : x
  2. Step 2: Convert to fraction form
    138,312.48/207,483.12 = 52,923.18/x
  3. Step 3: Cross multiply
    138,312.48x = 207,483.12 × 52,923.18
  4. Step 4: Simplify right side
    138,312.48x = 10,980,666,506.72
  5. Step 5: Solve for x
    x = 10,980,666,506.72/138,312.48
  6. Step 6: Final answer
    x = 79,390.28

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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.