Home / 130,191,428.20-195,003,707.10-78,984,135.40

Finding the Fourth Proportional to 130,191,428.20, 195,003,707.10 and 78,984,135.40

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Solution

The fourth proportional to 130,191,428.20, 195,003,707.10 and 78,984,135.40 is: 118,304,249.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,191,428.20 : 195,003,707.10 = 78,984,135.40 : x
  2. Step 2: Convert to fraction form
    130,191,428.20/195,003,707.10 = 78,984,135.40/x
  3. Step 3: Cross multiply
    130,191,428.20x = 195,003,707.10 × 78,984,135.40
  4. Step 4: Simplify right side
    130,191,428.20x = 15,402,199,205,088,342
  5. Step 5: Solve for x
    x = 15,402,199,205,088,342/130,191,428.20
  6. Step 6: Final answer
    x = 118,304,249.50

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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.