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Finding the Fourth Proportional to 101,616.40, 152,428.80 and 38,430.32

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Solution

The fourth proportional to 101,616.40, 152,428.80 and 38,430.32 is: 57,647.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,616.40 : 152,428.80 = 38,430.32 : x
  2. Step 2: Convert to fraction form
    101,616.40/152,428.80 = 38,430.32/x
  3. Step 3: Cross multiply
    101,616.40x = 152,428.80 × 38,430.32
  4. Step 4: Simplify right side
    101,616.40x = 5,857,887,561.22
  5. Step 5: Solve for x
    x = 5,857,887,561.22/101,616.40
  6. Step 6: Final answer
    x = 57,647.07

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1.5x scale

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.