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Finding the Fourth Proportional to 260,030.80, 390,017.40 and 73,061.20

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Solution

The fourth proportional to 260,030.80, 390,017.40 and 73,061.20 is: 109,583.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,030.80 : 390,017.40 = 73,061.20 : x
  2. Step 2: Convert to fraction form
    260,030.80/390,017.40 = 73,061.20/x
  3. Step 3: Cross multiply
    260,030.80x = 390,017.40 × 73,061.20
  4. Step 4: Simplify right side
    260,030.80x = 28,495,139,264.88
  5. Step 5: Solve for x
    x = 28,495,139,264.88/260,030.80
  6. Step 6: Final answer
    x = 109,583.71

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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.