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Finding the Fourth Proportional to 153,130.50, 211,320.09 and 86,062.50

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Solution

The fourth proportional to 153,130.50, 211,320.09 and 86,062.50 is: 118,766.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,130.50 : 211,320.09 = 86,062.50 : x
  2. Step 2: Convert to fraction form
    153,130.50/211,320.09 = 86,062.50/x
  3. Step 3: Cross multiply
    153,130.50x = 211,320.09 × 86,062.50
  4. Step 4: Simplify right side
    153,130.50x = 18,186,735,245.63
  5. Step 5: Solve for x
    x = 18,186,735,245.63/153,130.50
  6. Step 6: Final answer
    x = 118,766.25

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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.