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Finding the Fourth Proportional to 292,054.60, 438,081.90 and 70,438.60

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Solution

The fourth proportional to 292,054.60, 438,081.90 and 70,438.60 is: 105,657.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,054.60 : 438,081.90 = 70,438.60 : x
  2. Step 2: Convert to fraction form
    292,054.60/438,081.90 = 70,438.60/x
  3. Step 3: Cross multiply
    292,054.60x = 438,081.90 × 70,438.60
  4. Step 4: Simplify right side
    292,054.60x = 30,857,875,721.34
  5. Step 5: Solve for x
    x = 30,857,875,721.34/292,054.60
  6. Step 6: Final answer
    x = 105,657.90

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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.