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Finding the Fourth Proportional to 53,430.60, 80,145.90 and 49,931.40

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Solution

The fourth proportional to 53,430.60, 80,145.90 and 49,931.40 is: 74,897.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,430.60 : 80,145.90 = 49,931.40 : x
  2. Step 2: Convert to fraction form
    53,430.60/80,145.90 = 49,931.40/x
  3. Step 3: Cross multiply
    53,430.60x = 80,145.90 × 49,931.40
  4. Step 4: Simplify right side
    53,430.60x = 4,001,796,991.26
  5. Step 5: Solve for x
    x = 4,001,796,991.26/53,430.60
  6. Step 6: Final answer
    x = 74,897.10

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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.