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Finding the Fourth Proportional to 125,728.96, 173,538.84 and 77,955.16

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Solution

The fourth proportional to 125,728.96, 173,538.84 and 77,955.16 is: 107,598.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,728.96 : 173,538.84 = 77,955.16 : x
  2. Step 2: Convert to fraction form
    125,728.96/173,538.84 = 77,955.16/x
  3. Step 3: Cross multiply
    125,728.96x = 173,538.84 × 77,955.16
  4. Step 4: Simplify right side
    125,728.96x = 13,528,248,038.41
  5. Step 5: Solve for x
    x = 13,528,248,038.41/125,728.96
  6. Step 6: Final answer
    x = 107,598.50

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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.