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Finding the Fourth Proportional to 153,430.50, 211,734.12 and 89,780.52

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Solution

The fourth proportional to 153,430.50, 211,734.12 and 89,780.52 is: 123,897.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,430.50 : 211,734.12 = 89,780.52 : x
  2. Step 2: Convert to fraction form
    153,430.50/211,734.12 = 89,780.52/x
  3. Step 3: Cross multiply
    153,430.50x = 211,734.12 × 89,780.52
  4. Step 4: Simplify right side
    153,430.50x = 19,009,599,395.34
  5. Step 5: Solve for x
    x = 19,009,599,395.34/153,430.50
  6. Step 6: Final answer
    x = 123,897.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.