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Finding the Fourth Proportional to 190,368.40, 285,300.60 and 101,430.40

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Solution

The fourth proportional to 190,368.40, 285,300.60 and 101,430.40 is: 152,011.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,368.40 : 285,300.60 = 101,430.40 : x
  2. Step 2: Convert to fraction form
    190,368.40/285,300.60 = 101,430.40/x
  3. Step 3: Cross multiply
    190,368.40x = 285,300.60 × 101,430.40
  4. Step 4: Simplify right side
    190,368.40x = 28,938,153,978.24
  5. Step 5: Solve for x
    x = 28,938,153,978.24/190,368.40
  6. Step 6: Final answer
    x = 152,011.33

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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.