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Finding the Fourth Proportional to 128,295.81, 177,041.04 and 70,931.79

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Solution

The fourth proportional to 128,295.81, 177,041.04 and 70,931.79 is: 97,881.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,295.81 : 177,041.04 = 70,931.79 : x
  2. Step 2: Convert to fraction form
    128,295.81/177,041.04 = 70,931.79/x
  3. Step 3: Cross multiply
    128,295.81x = 177,041.04 × 70,931.79
  4. Step 4: Simplify right side
    128,295.81x = 12,557,837,870.66
  5. Step 5: Solve for x
    x = 12,557,837,870.66/128,295.81
  6. Step 6: Final answer
    x = 97,881.90

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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.