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Finding the Fourth Proportional to 525,779.52, 788,668.90 and 126,420.16

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Solution

The fourth proportional to 525,779.52, 788,668.90 and 126,420.16 is: 189,630.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,779.52 : 788,668.90 = 126,420.16 : x
  2. Step 2: Convert to fraction form
    525,779.52/788,668.90 = 126,420.16/x
  3. Step 3: Cross multiply
    525,779.52x = 788,668.90 × 126,420.16
  4. Step 4: Simplify right side
    525,779.52x = 99,703,648,525.02
  5. Step 5: Solve for x
    x = 99,703,648,525.02/525,779.52
  6. Step 6: Final answer
    x = 189,630.15

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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.