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Finding the Fourth Proportional to 260,117.61, 390,207.68 and 91,603.11

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Solution

The fourth proportional to 260,117.61, 390,207.68 and 91,603.11 is: 137,415.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,117.61 : 390,207.68 = 91,603.11 : x
  2. Step 2: Convert to fraction form
    260,117.61/390,207.68 = 91,603.11/x
  3. Step 3: Cross multiply
    260,117.61x = 390,207.68 × 91,603.11
  4. Step 4: Simplify right side
    260,117.61x = 35,744,236,187.74
  5. Step 5: Solve for x
    x = 35,744,236,187.74/260,117.61
  6. Step 6: Final answer
    x = 137,415.67

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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.