Home / 142,437.60-213,364.80-72,356.40

Finding the Fourth Proportional to 142,437.60, 213,364.80 and 72,356.40

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Solution

The fourth proportional to 142,437.60, 213,364.80 and 72,356.40 is: 108,386.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,437.60 : 213,364.80 = 72,356.40 : x
  2. Step 2: Convert to fraction form
    142,437.60/213,364.80 = 72,356.40/x
  3. Step 3: Cross multiply
    142,437.60x = 213,364.80 × 72,356.40
  4. Step 4: Simplify right side
    142,437.60x = 15,438,308,814.72
  5. Step 5: Solve for x
    x = 15,438,308,814.72/142,437.60
  6. Step 6: Final answer
    x = 108,386.47

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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.