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Finding the Fourth Proportional to 340,030.80, 510,065.40 and 103,381.20

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Solution

The fourth proportional to 340,030.80, 510,065.40 and 103,381.20 is: 155,077.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,030.80 : 510,065.40 = 103,381.20 : x
  2. Step 2: Convert to fraction form
    340,030.80/510,065.40 = 103,381.20/x
  3. Step 3: Cross multiply
    340,030.80x = 510,065.40 × 103,381.20
  4. Step 4: Simplify right side
    340,030.80x = 52,731,173,130.48
  5. Step 5: Solve for x
    x = 52,731,173,130.48/340,030.80
  6. Step 6: Final answer
    x = 155,077.64

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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.