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Finding the Fourth Proportional to 292,128.93, 438,193.40 and 70,512.93

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Solution

The fourth proportional to 292,128.93, 438,193.40 and 70,512.93 is: 105,769.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,128.93 : 438,193.40 = 70,512.93 : x
  2. Step 2: Convert to fraction form
    292,128.93/438,193.40 = 70,512.93/x
  3. Step 3: Cross multiply
    292,128.93x = 438,193.40 × 70,512.93
  4. Step 4: Simplify right side
    292,128.93x = 30,898,300,188.10
  5. Step 5: Solve for x
    x = 30,898,300,188.10/292,128.93
  6. Step 6: Final answer
    x = 105,769.40

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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.