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Finding the Fourth Proportional to 153,430.75, 211,734.47 and 89,780.77

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Solution

The fourth proportional to 153,430.75, 211,734.47 and 89,780.77 is: 123,897.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,430.75 : 211,734.47 = 89,780.77 : x
  2. Step 2: Convert to fraction form
    153,430.75/211,734.47 = 89,780.77/x
  3. Step 3: Cross multiply
    153,430.75x = 211,734.47 × 89,780.77
  4. Step 4: Simplify right side
    153,430.75x = 19,009,683,752.14
  5. Step 5: Solve for x
    x = 19,009,683,752.14/153,430.75
  6. Step 6: Final answer
    x = 123,897.48

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1.5x scale

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.