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Finding the Fourth Proportional to 144,707.60, 217,061.40 and 78,352.40

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Solution

The fourth proportional to 144,707.60, 217,061.40 and 78,352.40 is: 117,528.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,707.60 : 217,061.40 = 78,352.40 : x
  2. Step 2: Convert to fraction form
    144,707.60/217,061.40 = 78,352.40/x
  3. Step 3: Cross multiply
    144,707.60x = 217,061.40 × 78,352.40
  4. Step 4: Simplify right side
    144,707.60x = 17,007,281,637.36
  5. Step 5: Solve for x
    x = 17,007,281,637.36/144,707.60
  6. Step 6: Final answer
    x = 117,528.60

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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.